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BACKGROUND: Indigenous peoples are vulnerable to pandemics, including to the coronavirus disease (COVID)-19, since it causes high mortality and specially, the loss of elderly Indigenous individuals. METHODS: The epidemiological data of severe acute respiratory syndrome (SARS) by SARS-CoV-2 infection or other etiologic agents (OEA) among Brazilian Indigenous peoples during the first year of COVID-19 pandemic was obtained from a Brazilian Ministry of Health open-access database to perform an observational study. Considering only Indigenous individuals diagnosed with SARS by COVID-19, the epidemiology data were also evaluated as risk of death. The type of sample collection for virus screening, demographic profile, clinical symptoms, comorbidities, and clinical evolution were evaluated. The primary outcome was considered the death in the Brazilian Indigenous individuals and the secondary outcome, the characteristics of Brazilian Indigenous infected by SARS-CoV-2 or OEA, as the need for intensive care unit admission or the need for mechanical ventilation support. The statistical analysis was done using Logistic Regression Model. Alpha of 0.05. FINDINGS: A total of 3,122 cases of Indigenous individuals with SARS in Brazil were reported during the first year of the COVID-19 pandemic. Of these, 1,994 were diagnosed with COVID-19 and 730/1,816 (40.2%) of them died. The death rate among individuals with SARS-CoV-2 was three-fold increased when compared to the group of individuals with OEA. Several symptoms (myalgia, loss of smell, and sore throat) and comorbidities (cardiopathy, systemic arterial hypertension, and diabetes mellitus) were more prevalent in the COVID-19 group when compared to Indigenous individuals with OEA. Similar profile was observed considering the risk of death among the Indigenous individuals with COVID-19 who presented several symptoms (oxygen saturation <95%, dyspnea, and respiratory distress) and comorbidities (renal disorders, cardiopathy, and diabetes mellitus). The multivariate analysis was significant in differentiating between the COVID-19-positive and non-COVID-19 patients [X2 (7)=65.187; P-value<0.001]. Among the patients' features, the following contributed in relation to the diagnosis of COVID-19: age [≥43 years-old [y.o.]; OR=1.984 (95%CI=1.480-2.658)]; loss of smell [OR=2.373 (95%CI=1.461-3.854)]; presence of previous respiratory disorders [OR=0.487; 95%CI=0.287-0.824)]; and fever [OR=1.445 (95%CI=1.082-1.929)]. Also, the multivariate analysis was able to predict the risk of death [X2 (9)=293.694; P-value<0.001]. Among the patients' features, the following contributed in relation to the risk of death: male gender [OR=1.507 (95%CI=1.010-2.250)]; age [≥60 y.o.; OR=3.377 (95%CI=2.292-4.974)]; the need for ventilatory support [invasive mechanical ventilation; OR=24.050 (95%CI=12.584-45.962) and non-invasive mechanical ventilation; OR=2.249 (95%CI=1.378-3.671)]; dyspnea [OR=2.053 (95%CI=1.196-3.522)]; oxygen saturation <95% [OR=1.691 (95%CI=1.050-2.723)]; myalgia [OR=0.423 (95%CI=0.191-0.937)]; and the presence of kidney disorders [OR=3.135 (95%CI=1.144-8.539)]. INTERPRETATION: The Brazilian Indigenous peoples are in a vulnerable situation during the COVID-19 pandemic and presented an increased risk of death due to COVID-19. Several factors were associated with enhanced risk of death, as male sex, older age (≥60 y.o.), and need for ventilatory support; also, other factors might help to differentiate SARS by COVID-19 or by OEA, as older age (≥43 y.o.), loss of smell, and fever. FUNDING: Fundação de Amparo à Pesquisa do Estado de São Paulo (Foundation for Research Support of the State of São Paulo; #2021/05810-7).

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Abstract Background: Pulmonary involvement in juvenile systemic sclerosis (JSSc) is rare in children and contributes to morbimortality. This study aimed to describe the pulmonary function and clinical, radiologic, and tomographic findings in JSSc. Methods: Patients with JSSc between 5-14 years of age were included. Clinical, functional, and imaging characteristics were assessed. Patients were excluded if they showed lung disease not associated with JSSc: mixed connective tissue disease, overlap syndrome, or acute cardiopulmonary failure at the time of the study. All patients underwent physical examination, electrocardiogram, spirometry, chest X-ray, high-resolution computed tomography (HRCT) of the chest, echocardiography, lung function tests, and the 6-minute walk test (6-MWT). Descriptive statistics were employed for data analysis. Results: We studied 15 patients with the following characteristics: median age, 11 years; median since symptoms onset, 6 years; median since JSSc diagnosis and the finding of pulmonary involvement, 2 years. Lung disease was detected in 73%, interstitial lung disease (ILD) the most common affection (67%); pulmonary hypertension was found in 6.6%. 6-MWT was positive in 26.6%, forced vital capacity (FVC) was abnormal in 26.6%. No pulmonary involvement was found in four patients. Conclusions: The most frequent pulmonary affection in JSSc was ILD. Thus, early JSSc detection and periodic lung monitoring are mandatory to avoid further complications once JSSc is diagnosed.

Resumen Introducción: La afección pulmonar en la esclerosis sistémica juvenil (ESJ) es rara en niños y contribuye a la morbimortalidad. El objetivo de este estudio fue describir los hallazgos de función pulmonar, clínicos, radiológicos y tomográficos en la ESJ. Métodos: Se incluyeron pacientes con ESJ de 5-14 años de edad. Se evaluaron las características clínicas, funcionales y de imagen. No se incluyeron pacientes con enfermedades pulmonares no asociadas con ESJ en el momento del estudio: enfermedad mixta del tejido conectivo, síndrome de superposición o insuficiencia cardiopulmonar aguda. Se realizaron exploración física, electrocardiograma, espirometría, radiografía de tórax, tomografía computarizada de alta resolución de tórax, ecocardiografía, pruebas de función pulmonar y prueba de caminata de 6 minutos (PC6M). Se utilizó estadística descriptiva para el análisis de los datos. Resultados: Se estudiaron 15 pacientes con las siguientes características: mediana de edad, 11 años; mediana desde el inicio de los síntomas, 6 años; y mediana desde el diagnóstico de ESJ y hallazgo de afección pulmonar, 2 años. Se detectó enfermedad pulmonar en el 73%. La enfermedad pulmonar intersticial (EPI) fue la afección más común (67%) y se encontró hipertensión pulmonar en el 6.6%. La PC6M fue positiva en el 26.6%, y la capacidad vital forzada resultó anormal en el 26.6%. Cuatro pacientes no presentaron afección pulmonar. Conclusiones: La afección pulmonar más frecuente en la ESJ fue la EPI. La detección temprana de ESJ y la monitorización pulmonar periódica son obligatorias para evitar más complicaciones una vez diagnosticada la ESJ.

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Background: Pulmonary involvement in juvenile systemic sclerosis (JSSc) is rare in children and contributes to morbimortality. This study aimed to describe the pulmonary function and clinical, radiologic, and tomographic findings in JSSc. Methods: Patients with JSSc between 5-14 years of age were included. Clinical, functional, and imaging characteristics were assessed. Patients were excluded if they showed lung disease not associated with JSSc: mixed connective tissue disease, overlap syndrome, or acute cardiopulmonary failure at the time of the study. All patients underwent physical examination, electrocardiogram, spirometry, chest X-ray, high-resolution computed tomography (HRCT) of the chest, echocardiography, lung function tests, and the 6-minute walk test (6-MWT). Descriptive statistics were employed for data analysis. Results: We studied 15 patients with the following characteristics: median age, 11 years; median since symptoms onset, 6 years; median since JSSc diagnosis and the finding of pulmonary involvement, 2 years. Lung disease was detected in 73%, interstitial lung disease (ILD) the most common affection (67%); pulmonary hypertension was found in 6.6%. 6-MWT was positive in 26.6%, forced vital capacity (FVC) was abnormal in 26.6%. No pulmonary involvement was found in four patients. Conclusions: The most frequent pulmonary affection in JSSc was ILD. Thus, early JSSc detection and periodic lung monitoring are mandatory to avoid further complications once JSSc is diagnosed.

Introducción: La afección pulmonar en la esclerosis sistémica juvenil (ESJ) es rara en niños y contribuye a la morbimortalidad. El objetivo de este estudio fue describir los hallazgos de función pulmonar, clínicos, radiológicos y tomográficos en la ESJ. Métodos: Se incluyeron pacientes con ESJ de 5-14 años de edad. Se evaluaron las características clínicas, funcionales y de imagen. No se incluyeron pacientes con enfermedades pulmonares no asociadas con ESJ en el momento del estudio: enfermedad mixta del tejido conectivo, síndrome de superposición o insuficiencia cardiopulmonar aguda. Se realizaron exploración física, electrocardiograma, espirometría, radiografía de tórax, tomografía computarizada de alta resolución de tórax, ecocardiografía, pruebas de función pulmonar y prueba de caminata de 6 minutos (PC6M). Se utilizó estadística descriptiva para el análisis de los datos. Resultados: Se estudiaron 15 pacientes con las siguientes características: mediana de edad, 11 años; mediana desde el inicio de los síntomas, 6 años; y mediana desde el diagnóstico de ESJ y hallazgo de afección pulmonar, 2 años. Se detectó enfermedad pulmonar en el 73%. La enfermedad pulmonar intersticial (EPI) fue la afección más común (67%) y se encontró hipertensión pulmonar en el 6.6%. La PC6M fue positiva en el 26.6%, y la capacidad vital forzada resultó anormal en el 26.6%. Cuatro pacientes no presentaron afección pulmonar. Conclusiones: La afección pulmonar más frecuente en la ESJ fue la EPI. La detección temprana de ESJ y la monitorización pulmonar periódica son obligatorias para evitar más complicaciones una vez diagnosticada la ESJ.

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BACKGROUND: Usual interstitial pneumonia can present with a probable pattern on high-resolution computed tomography (HRCT), but the probability of identifying usual interstitial pneumonia by surgical lung biopsy in such cases remains controversial. We aimed to determine the final clinical diagnosis in patients with a probable usual interstitial pneumonia pattern on HRCT who were subjected to surgical lung biopsy. METHODS: HRCT images were assessed and categorized by three radiologists, and tissue slides were evaluated by two pathologists, all of whom were blinded to the clinical findings. The final clinical diagnosis was accomplished via a multidisciplinary discussion. Patients with a single layer of honeycombing located outside of the lower lobes on HRCT were not excluded. RESULTS: A total of 50 patients were evaluated. The most common final clinical diagnosis was fibrotic hypersensitivity pneumonitis (38.0%) followed by idiopathic pulmonary fibrosis (24.0%), interstitial lung disease ascribed to gastroesophageal reflux disease (12.0%) and familial interstitial lung disease (10.0%). In the group without environmental exposure (n = 22), 10 patients had a final clinical diagnosis of idiopathic pulmonary fibrosis (45.5%). Irrespective of the final clinical diagnosis, by multivariate Cox analysis, patients with honeycombing, dyspnoea and fibroblastic foci on surgical lung biopsy had a high risk of death. CONCLUSIONS: The most common disease associated with a probable usual interstitial pneumonia pattern on HRCT is fibrotic hypersensitivity pneumonitis followed by idiopathic pulmonary fibrosis and interstitial lung disease ascribed to gastroesophageal reflux disease. In patients without environmental exposure, the frequencies of usual interstitial pneumonia and a final clinical diagnosis of idiopathic pulmonary fibrosis are not sufficiently high to obviate the indications for surgical lung biopsy.

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BACKGROUND AND AIMS: Chest high-resolution computed tomography (HRCT) is the central diagnostic tool in discerning idiopathic pulmonary fibrosis (IPF) from other interstitial lung disease (ILDs). In 2018, new guidelines were published and the nomenclature for HRCT interpretation was changed. We sought to evaluate how clinicians' interpretation would change based on reading HRCTs under the framework of the old versus new categorization. MATERIALS AND METHODS: We collated HRCTs from 50 random cases evaluated in the Inova Fairfax ILD clinic. Six ILD experts were provided the deidentified HRCTs. They were all instructed to independently provide two reads of each HRCT, based on the old and the new guidelines. RESULTS: The kappa statistic for concordance for HRCT reads under old guidelines was 0.5, while for the new guidelines it was 0.38. Under the framework of the old guidelines, there were 22 HRCTs with unanimous consensus reads, while only 15 with the new guidelines. There were 12 HRCTs read unanimously as usual interstitial pneumonia (UIP) pattern based on both the old and the new guidelines. Ten HRCTs were read as a possible UIP pattern based on the old guidelines and were classified in nine cases as probable UIP and one indeterminate based on the new guidelines. Of the 28 inconsistent UIP HRCTs (old guidelines), 25 were read as alternative diagnosis suggested, two were read as indeterminate and one as probable UIP. CONCLUSION: Implementation of the new guidelines to categorize HRCTs in ILD patients appears to be associated with greater inter-interpreter variability. How or whether new guidelines improve the care and management of ILD patients remains unclear.The reviews of this paper are available via the supplemental material section.

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Resumen: Introducción: Las enfermedades pulmonares intersticiales son un grupo muy heterogéneo de afecciones que tienen manifestaciones clínicas, radiológicas y funcionales en común. Su epidemiología está documentada en forma parcial y su etiología es muy variada. El diagnóstico se basa en la clínica, la tomografía computada de alta resolución y, en algunos casos, la histología. Objetivos: describir la población de pacientes con diagnóstico de enfermedad pulmonar intersticial asistidos en la Policlínica de Intersticiopatías del Hospital Pasteur en el período comprendido entre el 5 de mayo de 2017 y el 17 de mayo de 2019. Materiales y métodos: Estudio descriptivo, observacional y transversal. Se utilizó un muestreo por conveniencia. Las variables analizados fueron: edad, sexo, comorbilidades, etiología, patrón tomográfico predominante, funcional respiratorio (Test de Marcha 6 Minutos y espirometría forzada con difusión de monóxido) y tratamiento instituido. Se obtuvo consentimiento informado y el trabajo fue aprobado por el Comité de Bioética del Hospital Pasteur. Resultados: 20 de los 42 pacientes asistidos eran portadores de enfermedad pulmonar intersticial. Predominó el sexo femenino (14 pacientes, 70%). La edad media fue 60 ± 16.84 años. La comorbilidad más frecuente fue el tabaquismo (13 pacientes, 65%). En 6 pacientes (30%) se identificaron exposiciones ambientales o laborales de riesgo. La etiología fue determinada en 15 pacientes (75%), siendo en 10 pacientes (50%) asociada a enfermedades autoinmunes sistémicas y en 3 pacientes (15%) neumonitis por hipersensibilidad. La mayoría (11 pacientes, 55%) tuvieron patrones tomográficos inespecíficos. 94.11% tuvieron un patrón restrictivo en el estudio funcional respiratorio, predominando la restricción moderada a severa. La difusión monóxido media fue 47.25 ± 16.71%. 11 pacientes (55%) fueron tratados con corticoides sistémicos y 2 pacientes necesitaron oxígeno a permanencia. Conclusiones: Las características demográficas, etiología, patrones tomográficos y tratamiento instituidos están influenciados por un sesgo de selección, ya que una elevada proporción de pacientes son derivados desde policlínicas de enfermedades autoinmunes sistémicas. Es fundamental un manejo integral de estos pacientes porque la asociación con otras enfermedades que pueden contribuir en la sintomatología es frecuente. Las enfermedades pulmonares intersticiales encontradas son mayormente severas y de diagnóstico tardío.

Abstract: Introduction: Interstitial lung diseases are a very heterogeneous group of conditions that have common clinical, radiological and functional manifestations. Its epidemiology is partially documented and its etiology is very varied. The diagnosis is based on the clinic, high resolution computed tomography and, in some cases, histology. Objectives: to describe the population of patients diagnosed with interstitial lung disease assisted at the Hospital Pasteur Polyclinic for Interstitiopathies in the period between May 5, 2017 and May 17, 2019. Materials and methods: Descriptive, observational and cross. Convenience sampling was used. The variables analyzed were: age, sex, comorbidities, etiology, predominant tomographic pattern, respiratory function (6-minute walk test and forced spirometry with monoxide diffusion) and instituted treatment. Informed consent was obtained and the work was approved by the Bioethics Committee of the Pasteur Hospital. Results: 20 of the 42 assisted patients were carriers of interstitial lung disease. Female sex predominated (14 patients, 70%). The mean age was 60 ± 16.84 years. The most frequent comorbidity was smoking (13 patients, 65%). Environmental or occupational risk exposures were identified in 6 patients (30%). The etiology was determined in 15 patients (75%), being associated with systemic autoimmune diseases in 10 patients (50%) and hypersensitivity pneumonitis in 3 patients (15%). Most (11 patients, 55%) had nonspecific tomographic patterns. 94.11% had a restrictive pattern in the functional respiratory study, with moderate to severe restriction prevailing. The average monoxide diffusion was 47.25 ± 16.71%. 11 patients (55%) were treated with systemic corticosteroids and 2 patients required oxygen permanently. Conclusions: The demographic characteristics, etiology, tomographic patterns and instituted treatment are influenced by a selection bias, since a high proportion of patients are derived from polyclinics for systemic autoimmune diseases. Comprehensive management of these patients is essential because the association with other diseases that may contribute to the symptoms is frequent. The interstitial lung diseases found are mostly severe and late diagnosed.

Resumo: Introdução: As doenças pulmonares intersticiais são um grupo muito heterogêneo de condições que apresentam manifestações clínicas, radiológicas e funcionais comuns. Sua epidemiologia está parcialmente documentada e sua etiologia é muito variada. O diagnóstico é baseado na clínica, na tomografia computadorizada de alta resolução e, em alguns casos, na histologia. Objetivos: descrever a população de pacientes com diagnóstico de doença pulmonar intersticial atendidos no Hospital Pasteur Polyclinic for Interstitiopathies no período de 5 de maio de 2017 a 17 de maio de 2019. Materiais e métodos: descritivos, observacionais e Cruz. Amostragem por conveniência foi utilizada. As variáveis ​​analisadas foram: idade, sexo, comorbidades, etiologia, padrão tomográfico predominante, função respiratória (teste de caminhada de 6 minutos e espirometria forçada com difusão de monóxido) e tratamento instituído. O consentimento informado foi obtido e o trabalho foi aprovado pelo Comitê de Bioética do Hospital Pasteur. Resultados: 20 dos 42 pacientes assistidos eram portadores de doença intersticial pulmonar. O sexo feminino predominou (14 pacientes, 70%). A idade média foi de 60 ± 16,84 anos. A comorbidade mais frequente foi o tabagismo (13 pacientes, 65%). As exposições a riscos ambientais ou ocupacionais foram identificadas em 6 pacientes (30%). A etiologia foi determinada em 15 pacientes (75%), sendo associada a doenças autoimunes sistêmicas em 10 pacientes (50%) e pneumonite por hipersensibilidade em 3 pacientes (15%). A maioria (11 pacientes, 55%) apresentava padrões tomográficos inespecíficos. 94,11% apresentaram padrão restritivo no estudo respiratório funcional, prevalecendo restrição moderada a grave. A difusão média de monóxido foi de 47,25 ± 16,71%. 11 pacientes (55%) foram tratados com corticosteróides sistêmicos e 2 pacientes necessitaram de oxigênio permanentemente. Conclusões: As características demográficas, etiologia, padrões tomográficos e tratamento instituído são influenciados por um viés de seleção, pois uma alta proporção de pacientes é derivada de policlínica para doenças autoimunes sistêmicas. O manejo abrangente desses pacientes é essencial, pois a associação com outras doenças que podem contribuir para os sintomas é frequente. As doenças pulmonares intersticiais encontradas são na maioria graves e diagnosticadas tardiamente.

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RESUMO Objetivo Correlacionar a prevalência e o prognóstico de cada padrão de TCAR de pneumonia intersticial usual (PIU) típica, provável e indeterminada com o diagnóstico clínico multidisciplinar de doença pulmonar intersticial (DPI). Métodos Incluímos todos os pacientes com diagnóstico multidisciplinar de DPI com padrão de TCAR de PIU típica, PIU provável ou indeterminada para PIU. Dados clínicos e histopatológicos, teste de função pulmonar e status de sobrevida foram obtidos retrospectivamente. O diagnóstico final foi validado por uma equipe multidisciplinar. Resultados Foram incluídos no estudo 244 pacientes, com média de idade de 68 ± 13 anos sendo 52,5% do sexo masculino. Em um total de 106 pacientes com padrão típico de PIU, 62% tiveram o diagnóstico multidisciplinar de FPI, 20% de pneumonia por hipersensibilidade crônica (PHC) e 10% de DPI relacionada à doença do tecido conjuntivo (DPI-DTC). Dos 114 casos com provável PIU, DPI-DTC correspondeu a 39%, FPI a 31%, pneumonia intersticial descamativa a 11%, doença pulmonar relacionada a medicamentos a 9% e PHC a 8%. Nos 24 pacientes com TC indeterminada para PIU, o DPI-DTC foi o diagnóstico final em 33%, seguido por pneumonia intersticial descamativa (21%) e FPI (13%). Pacientes com PIU típica apresentaram maior probabilidade de morrer ou realizar transplante de pulmão no seguimento (17,9% e 11,3%, respectivamente). Conclusões FPI, PHC e DPI-DTC foram os principais diagnósticos diferenciais em pacientes com padrão de TCAR de PIU típica, provável e indeterminada. Pacientes com padrão de PIU típico na TCAR tiveram maior probabilidade de morrer ou realizar transplante de pulmão no seguimento.

ABSTRACT Objective To correlate the prevalence and prognosis of each HRCT pattern of typical, probable, and indeterminate usual interstitial pneumonia (UIP) with the clinical multidisciplinary diagnosis of interstitial lung disease (ILD). Methods We included all patients with a multidisciplinary diagnosis of ILD with an HRCT pattern of typical UIP, probable UIP, or indeterminate for UIP. Clinical and histopathological data, pulmonary function tests, and survival status were retrospectively obtained. The final diagnosis was validated by a multidisciplinary team. Results A total of 244 patients were included in the study, with a mean age of 68 ±13 years and being 52.5% males. In a total of 106 patients with typical UIP pattern, 62% had the multidisciplinary diagnosis of IPF, 20% had chronic hypersensitivity pneumonitis (CHP), and 10% had connective tissue disease-related ILD (CTD-ILD). Out of the 114 cases with probable UIP, CTD-ILD corresponded to 39%, IPF to 31%, desquamative interstitial pneumonia to 11%, drug-related lung disease to 9%, and CHP to 8%. In the 24 patients with CT indeterminate for UIP, CTD-ILD was the final diagnosis in 33%, followed by desquamative interstitial pneumonia (21%), and IPF (13%). Patients with typical UIP were more likely to die or had lung transplantation in the follow-up (17.9% and 11.3%, respectively). Conclusion IPF, CHP, and CTD-ILD were the main differential diagnoses in patients with HRCT patterns of typical, probable and indeterminate UIP. Patients with HRCT typical UIP pattern were more likely to die or had lung transplantation in the follow-up.

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Abstract. Otosclerosis is a common cause of progressive hearing loss in the young adult population. Most of the time the diagnosis is suspected based on consistent clinical symptoms and physical examination. The role of imaging in this pathology consists of confirmation of doubtful cases, ruling out by differential diagnoses, level of affection, and the pre-postoperative evaluation of patients. High-resolution computed tomography of the temporal bone is the imaging method of choice.

Resumen. La otoesclerosis corresponde a una causa común de hipoacusia progresiva en población adulta joven. La mayoría de las veces el diagnóstico es sospechado en base a un cuadro clínico y examen físico concordantes. El rol de las imágenes en esta enfermedad consiste en la confirmación de los casos dudosos, el descarte de diagnósticos diferenciales, la graduación del compromiso y la evaluación pre- y posquirúrgica de los pacientes. La tomografía computada de alta resolución del hueso temporal es el método de estudio imagenológico de elección.

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La cistitis enfisematosa se define como la presencia de gas en la pared vesical secundaria a infección por microorganismos productores de gas. Es más frecuente en el género femenino, con predominio entre la sexta y octava década de la vida. Los factores de riesgo identificados son inmunosupresión, alteraciones estructurales o neurológicas del tracto urinario inferior, entre otros. Su prevalencia o incidencia es desconocida, dada la baja frecuencia de la enfermedad. Su forma de presentación clínica es muy variable e incluye desde un paciente asintomático hasta sepsis fulminante. El diagnóstico se puede realizar a través de estudios complementarios por imágenes o por métodos de visualización directa como la cistoscopia, laparotomía o laparoscopia, requiriendo rescate bacteriológico para confirmar la etiología infecciosa, siendo el método diagnóstico más usado la tomografía computarizada. Presentamos el caso de una paciente femenina con inmunosupresión crónica por esteroides a altas dosis como parte de manejo de lupus eritematoso sistémico retroneumoperitoneo y enfisema de tejidos blandos pélvicos secundario a cistitis enfisematosa por Klebsiella pneaumoniae. Se trata del primer caso reportado de retroneumoperitoneo secundario a cistitis enfisematosa en una paciente con lupus eritematoso sistémico cuyo único factor de riesgo identificado fue la inmunosupresión farmacológica con esteroides.

Emphysematous cystitis is defined as the presence of gas in the bladder wall due to infection by gas-forming organisms. It is more common in females, predominantly between the sixth and eighth decades of life. The identified risk factors are immunosuppression (secondary to systemic diseases or drugs); structural or neurological lower urinary tract alterations, among others. Prevalence or incidence is unknown. Clinical manifestations are variable, ranges from an asymptomatic patient to fulminant sepsis. Although diagnosis can be made through complementary diagnostic imaging or direct visualization methods such as cystoscopy, laparotomy or laparoscopy, requiring bacteriological rescue to confirm infectious etiology. The most frequently diagnostic tool used is computed tomography. We report the case of a patient with systemic lupus erythematosus presenting with retropneumoperitoneum secondary to emphysematous cystitis due to infection by Klebsiella pneumonia This is the first reported case of retropneumoperitoneum secundary to emphysematous cystitis in a patient with systemic lupus erythematosus whose only risk factor identified was the pharmacological immunosuppression with steroids.

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OBJECTIVE: The present study was aimed at retrospectively reviewing high-resolution computed tomography (HRCT) findings in patients with pulmonary alveolar microlithiasis in order to evaluate the frequency of tomographic findings and their distribution in the lung parenchyma. MATERIALS AND METHODS: Thirteen patients (9 females and 4 males; age, 9 to 59 years; mean age, 34.5 years) were included in the present study. The HRCT images were independently evaluated by two observers whose decisions were made by consensus. The inclusion criterion was the presence of abnormalities typical of pulmonary alveolar microlithiasis at HRCT, which precludes lung biopsy. However, in 6 cases lung biopsy was performed. RESULTS: Ground-glass opacities and small parenchymal nodules were the predominant tomographic findings, present in 100% of cases, followed by small subpleural nodules (92.3%), subpleural cysts (84.6%), subpleural linear calcifications (69.2%), crazy-paving pattern (69.2%), fissure nodularity (53.8%), calcification along interlobular septa (46.2%) and dense consolidation (46.2%). CONCLUSION: As regards distribution of the lesions, there was preferential involvement of the lower third of the lungs. No predominance of distribution in axial and anteroposterior directions was observed.

OBJETIVO: Analisar, retrospectivamente, as tomografias computadorizadas de alta resolução (TCAR) de pacientes com microlitíase alveolar pulmonar, a fim de avaliar a frequência dos padrões tomográficos e sua distribuição no parênquima pulmonar. MATERIAIS E MÉTODOS: O estudo incluiu 13 pacientes (9 femininos e 4 masculinos) com idades variando de 9 a 59 anos (média de 34,5 anos). Os exames foram avaliados por dois observadores, de modo independente, e os casos discordantes, resolvidos por consenso. O critério de inclusão foi a presença de anormalidades na TCAR típicas de microlitíase alveolar pulmonar, o que prescinde a necessidade de exame histopatológico. Entretanto, em 6 casos foram realizadas biópsias pulmonares. RESULTADOS: Os achados tomográficos predominantes foram opacidades em vidro fosco e pequenos nódulos parenquimatosos, presentes em 100% dos casos, seguidos de pequenos nódulos subpleurais (92,3%), cistos subpleurais (84,6%), calcificações lineares subpleurais (69,2%), padrão de pavimentação em mosaico (69,2%), fissura nodular (53,8%), calcificação ao longo dos septos interlobulares (46,2%) e consolidações densas (46,2%). CONCLUSÃO: Quanto à distribuição dos achados, houve acometimento preferencial dos terços inferiores. Não foi observado predomínio de distribuição dos sentidos axial e anteroposterior.

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AbstractObjective:The present study was aimed at retrospectively reviewing high-resolution computed tomography (HRCT) findings in patients with pulmonary alveolar microlithiasis in order to evaluate the frequency of tomographic findings and their distribution in the lung parenchyma.Materials and Methods:Thirteen patients (9 females and 4 males; age, 9 to 59 years; mean age, 34.5 years) were included in the present study. The HRCT images were independently evaluated by two observers whose decisions were made by consensus. The inclusion criterion was the presence of abnormalities typical of pulmonary alveolar microlithiasis at HRCT, which precludes lung biopsy. However, in 6 cases lung biopsy was performed.Results:Ground-glass opacities and small parenchymal nodules were the predominant tomographic findings, present in 100% of cases, followed by small subpleural nodules (92.3%), subpleural cysts (84.6%), subpleural linear calcifications (69.2%), crazy-paving pattern (69.2%), fissure nodularity (53.8%), calcification along interlobular septa (46.2%) and dense consolidation (46.2%).Conclusion:As regards distribution of the lesions, there was preferential involvement of the lower third of the lungs. No predominance of distribution in axial and anteroposterior directions was observed.

ResumoObjetivo:Analisar, retrospectivamente, as tomografias computadorizadas de alta resolução (TCAR) de pacientes com microlitíase alveolar pulmonar, a fim de avaliar a frequência dos padrões tomográficos e sua distribuição no parênquima pulmonar.Materiais e Métodos:O estudo incluiu 13 pacientes (9 femininos e 4 masculinos) com idades variando de 9 a 59 anos (média de 34,5 anos). Os exames foram avaliados por dois observadores, de modo independente, e os casos discordantes, resolvidos por consenso. O critério de inclusão foi a presença de anormalidades na TCAR típicas de microlitíase alveolar pulmonar, o que prescinde a necessidade de exame histopatológico. Entretanto, em 6 casos foram realizadas biópsias pulmonares.Resultados:Os achados tomográficos predominantes foram opacidades em vidro fosco e pequenos nódulos parenquimatosos, presentes em 100% dos casos, seguidos de pequenos nódulos subpleurais (92,3%), cistos subpleurais (84,6%), calcificações lineares subpleurais (69,2%), padrão de pavimentação em mosaico (69,2%), fissura nodular (53,8%), calcificação ao longo dos septos interlobulares (46,2%) e consolidações densas (46,2%).Conclusão:Quanto à distribuição dos achados, houve acometimento preferencial dos terços inferiores. Não foi observado predomínio de distribuição dos sentidos axial e anteroposterior.

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The cranial base, composed of the midline and lateral basicranium, is a structurally important region of the skull associated with several key traits, which has been extensively studied in anthropology and primatology. In particular, most studies have focused on the association between midline cranial base flexion and relative brain size, or encephalization. However, variation in lateral basicranial morphology has been studied less thoroughly. Platyrrhines are a group of primates that experienced a major evolutionary radiation accompanied by extensive morphological diversification in Central and South America over a large temporal scale. Previous studies have also suggested that they underwent several evolutionarily independent processes of encephalization. Given these characteristics, platyrrhines present an excellent opportunity to study, on a large phylogenetic scale, the morphological correlates of primate diversification in brain size. In this study we explore the pattern of variation in basicranial morphology and its relationship with phylogenetic branching and with encephalization in platyrrhines. We quantify variation in the 3D shape of the midline and lateral basicranium and endocranial volumes in a large sample of platyrrhine species, employing high-resolution CT-scans and geometric morphometric techniques. We investigate the relationship between basicranial shape and encephalization using phylogenetic regression methods and calculate a measure of phylogenetic signal in the datasets. The results showed that phylogenetic structure is the most important dimension for understanding platyrrhine cranial base diversification; only Aotus species do not show concordance with our molecular phylogeny. Encephalization was only correlated with midline basicranial flexion, and species that exhibit convergence in their relative brain size do not display convergence in lateral basicranial shape. The evolution of basicranial variation in primates is probably more complex than previously believed, and understanding it will require further studies exploring the complex interactions between encephalization, brain shape, cranial base morphology, and ecological dimensions acting along the species divergence process.

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BACKGROUND: Interstitial lung disease (ILD) is a frequent complication in progressive systemic sclerosis (SSc), being present in 25% to 90% of cases. OBJECTIVES: To evaluate whether serum levels of procollagen typei and iii aminoterminal propeptide (PINP and PIIINP) correlate with severity and patterns of ILD in Mexican women with SSc. METHODS: Thirty three SSc patients were assessed for disease characteristics and anti-topoisomerase antibodies (topoi), and also underwent pulmonary function tests and high-resolution computed tomography (HRCT). Nineteen patients had ILD+SSc, and 14 had no lung involvement (no ILD-SSc); data were compared with those from 45 healthy controls. PINP and PIIINP were assessed in all 3 groups. RESULTS: Patients with SSc had higher PINP and PIIINP vs controls (P=.001, P<.001, respectively). Compared to no ILD-SSc patients, those with ILD+SSc had longer disease duration in years (P=.005), higher modified Rodnan skin score (P<.001), higher Health Assessment Questionnaire-Disability-Index scores (P<.001), higher topoi U/mL (P<.001), PINP (49.28±28.63 vs. 32.12±18.58µg/L, P=.05), and PIIINP (4.33±1.03 vs. 2.67±1.26µg/L, P<.001) levels. ILD severity based on total HRCT correlated with PINP (r=.388, P=.03) and PIIINP (P=.594, P<.001). On adjusted analysis, ILD severity was associated with disease duration (P=.037), PIIINP (P=.038), and topoi (P=.045). CONCLUSIONS: PINP and PIIINP are useful markers for severe ILD+SSc, suggesting they could play a role in the follow-up of this complication in SSc.

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Introducción: Las bronquiectasias (BQ) son una enfermedad supurativa, de creciente prevalencia, rasgos fenotípicos heterogéneos y diagnóstico por Tomografía de alta resolución (TACAR). Objetivos del presente trabajo: a) comparar el compromiso anatómico por TACAR con los parámetros espirométricos estándar, b) evaluar las exacerbaciones registradas en relación a los tratamientos recibidos, c) describir los hallazgos microbiológicos obtenidos. Materiales y Métodos: Se estudiaron retrospectivamente las historias clínicas de 33 pacientes ambulatorios estables con BQ no relacionadas a Fibrosis Quística. Se registraron las exacerbaciones durante el año anterior a la consulta. Todos los pacientes tenian TACAR con cuantificación de lóbulos pulmonares afectados, espirometría con broncodilatadores y cultivo de esputo. Resultados: A) No hubo diferencias significativas en extensión lobar para FEV1 en mililitros (p≤0.180); FEV1% predicho (p ≤ 0.102); cociente FEV1FVC (p ≤ 0.680); las diferencias fueron significativas para FVC % predicho (p ≤ 0.037). B) las exacerbaciones (≤ 1, n = 5; ≥ 2, n = 28) fueron eventos frecuentes; hubo 24/33 pacientes con tratamiento de corticoides inhalados; 9/33 con corticoides sistémicos y 29/33 con antibióticos C) los aislamientos bacteriológicos se realizaron en 11/33 pacientes: 6 para P. Auriginosa, 2 S. Neumoniae, 2 S. aureus (1 MS, 1MR) ,1S. viridans. Las Prevalencias Relativas no indican influencia de la terapéutica con corticoides inhalados (0.558), corticoides sistémicos (0.668) y antibióticos (0.412) respecto al número de exacerbaciones. Conclusiones: la evaluación de FVC % predicho por espirometría puede resultar un recurso simple para evaluar el compromiso anatómico en BQ no fibroquística. Los efectos de la terapéutica convencional sobre la prevalencia de exacerbaciones clínicas no pudieron demostrarse con este diseño.

Introduction: Bronchiectasis is a permanent abnormal dilatation of an airway and the diagnosis should be made by computed tomography (HRCT). Objectives: a) to compare the HRCT anatomical involvement with standard spirometric parameters, b) to assess recorded exacerbations with regard to treatment received, c) to describe the microbiological findings. Methods: Clinical records of 33 stable outpatients with non cystic fibrosis bronchiectasis were retrospectively studied. Exacerbations were recorded during the year prior to the first visit. HRCT with quantification of affected lobes, spirometry and sputum culture were performed to all patients. Results: A) There were no significant differences in lobar extension for FEV1 (milliliters) (p ≤ 0.180), FEV1% predicted (p ≤ 0.102); FEV1/FVC ratio (p ≤ 0.680). The differences were significant for FVC % predicted (p ≤ 0.037). B) Exacerbations (≤ 1, n = 5; ≥ 2, n = 28) were frequent events. There were 24/33 patients treated with inhaled corticosteroids; 9/33 with systemic corticosteroids and 29/33 with antibiotics. C) Bacteriological isolations were reported in 11/33 patients: 6 for P. Aeruginosa, 2 S. Pneumoniae, 2 S. aureus, 1 S. viridans. Relative frequencies showed no influence of treatment with inhaled corticosteroids (0.558), systemic corticosteroids (0.668) and antibiotics (0412) regarding exacerbations. Conclusions: Evaluation of FVC% predicted can be a simple resource to assess the anatomic involvement in non-cystic fibrosis bronchiectasis. The effects of conventional therapy on the prevalence of clinical exacerbations could not be demonstrated with this study design.

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A síndrome de Mounier-Kuhn é uma doença rara, caracterizada clinicamente por infecções respiratórias de repetição. Apresentamos um relato de caso desta doença com análise da radiografia e da tomografia computadorizada de alta resolução do tórax que mostram como principais alterações aumento do calibre da traqueia, brônquios principais e bronquiectasias centrais. Estas alterações, associadas às informações clínicas, sugerem o diagnóstico.

Mounier-Kuhn syndrome is a rare disease clinically characterized by recurrent respiratory infections. The present report describes a case of this disease with analysis of chest radiography and high resolution computed tomography showing increased caliber of the trachea, main bronchi and central bronchiectasis. Such changes, in association with clinical data, suggest the diagnosis.

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El Sarcoma de Kaposi (SK) es una causa de compromiso respiratorio en el VIH/SIDA, que clásicamente ha indicado un pronóstico desfavorable. Esta definición está modificándose,según la extensión y alcance de los tratamientos actuales con antiretrovirales (HAART). Se exponen los rasgos clínicos y los recursos diagnósticos empleados en dos pacientesasistidos en nuestro hospital universitario. Las lesiones mucocutáneas generalizadas, los patrones característicos de tomografía computada de alta resolución (TCAR) junto a los hallazgos fibrobroncoscópicos (FBC) son descriptos en ambos casos. Se discuten los diagnósticos diferenciales para neoplasias e infecciones oportunistas, con la correspondiente revisión bibliográfica.

Kaposi´s sarcoma (KS) is considered one of the most severe manifestations related to lung involvement in HIV/AIDS. Present therapy with HAART has modified the incidence and prognosis of Kaposi´s sarcoma. However, KS is still a prevalent condition in HIV/AIDS patients. Clinical features, diagnostic patterns from High Resolution Computed Tomography (HRCT), and bronchofibroscopy findings are described in two patients.Differential diagnosis for main conditions in the AIDS clinical context (malignant neoplasm, opportunistic infections) is discussed with a review of previous reports.

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La tomografía computada de alta resolución representa una herramienta fundamental en la evaluación de los pacientes con diagnostico de Fibrosis Quística, siendo en la actualidad la modalidad de imagen de elección. Revisamos las anomalías más frecuentes y su aspecto tomográfico reportando los hallazgos en pacientes de nuestra institución.

High Resolution Computed Tomography represents an important tool in the evaluation of patients with Cystic Fibrosis, being the imaging choice method. We review and report the tomographic findings of the most important anomalies in patients of our institution.

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As doenças pulmonares intersticiais compreendem um grupo heterogêneo de pneumopatias, com curso clínico e resposta à terapêutica variáveis. A avaliação clínica adequada, aliada ao exame radiológico do tórax, em especial a tomografia de alta resolução, podem dar subsídios suficientes para o diagnóstico de algumas destas doenças dos tipos fibrose pulmonar idiopática, pneumonia organizante criptogênica, sarcoidose, histiocitose de células de Langerhans do pulmão e linfangioleiomiomatose. Nos casos em que a avaliação clinicorradiológica não for conclusiva, a biópsia pulmonar é necessária. São ilustrados neste trabalho, casos clínicos referentes a esses grupos de afecções, com discussão da necessidade de realização ou não da biópsia pulmonar. É importante a abordagem multidisciplinar das doenças pulmonares intersticiais, realizada por profissionais experimentados no tema, para melhor elucidação etiológica e dirimir os problemas relacionados às confusões com relação aos diagnósticos encontrados.

Interstitial lung diseases comprise a heterogeneous group of pneumopaties with variable clinical courses and therapeutic responses. The proper clinical assessment together with radiological study by thoracic imaging—especially the high-resolution tomography—may provide sufficient subsidies to diagnose some of these diseases, such as idiopathic pulmonary fibrosis, cryptogenic organizing pneumonia, sarcoidosis, pulmonary Langerhans cell histiocytosis, and lymphangioleiomyomatosis. In cases where the clinical-radiological assessment is non-conclusive, a lung biopsy is necessary. In the present work, clinical cases referring to such pathologies’ groups are illustrated and discussed on whether there is a need for carrying out a lung biopsy. It is important that a multidisciplinary approach be made on interstitial lung diseases, by professionals experienced in the subject, so to better etiological elucidation, thus sorting out problems related to errors in found diagnoses.