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ABSTRACT Purpose To assess the incidence of the most common intra- and early postoperative complications following RIRS in a large series of patients with kidney stones. Methods We conducted a retrospective analysis of patients with kidney stones who underwent RIRS across 21 centers from January 2018 to August 2021, as part of the Global Multicenter Flexible Ureteroscopy Outcome (FLEXOR) Registry. Results Among 6669 patients undergoing RIRS, 4.5% experienced intraoperative pelvicalyceal system bleeding without necessitating blood transfusion. Only 0.1% of patients, required a blood transfusion. The second most frequent intraoperative complication was ureteric injury due to the ureteral access sheath requiring stenting (1.8% of patients). Postoperatively, the most prevalent early complications were fever/infections requiring antibiotics (6.3%), blood transfusions (5.5%), and sepsis necessitating intensive care unit admission (1.3%). In cases of ureteric injury, a notably higher percentage of patients exhibited multiple stones and stone(s) in the lower pole, and these cases were correlated with prolonged lasing and overall surgical time. Hematuria requiring a blood transfusion was associated with an increased prevalence of larger median maximum stone diameters, particularly among patients with stones exceeding 20 mm. Furthermore, these cases exhibited a significant prolongation in surgical time. Sepsis necessitating admission to the intensive care unit was more prevalent among the elderly, concomitant with a significantly larger median maximum stone diameter. Conclusions Our analysis showed that RIRS has a good safety profile but bleeding requiring transfusions, ureteric injury, fever, and sepsis are still the most common complications despite advancements in technology.

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Hematuria microscópica asintomática se presenta cuando en un urinálisis se detectan ≥ 3 glóbulos rojos por campo de alto poder y no está acompañada de algún síntoma; dicho análisis debe ser repetido en una segunda o tercera ocasión para determinar si estamos ante una hematuria microscópica real, y no se debe a una causa benigna como trauma, eyaculación, menstruación, ejercicio extenuante antes de la prueba. El abordaje de esta condición va a depender de la etiología, si en el urinálisis también presenta cilindros, proteinuria y tiene hipertensión arterial o insuficiencia renal la causa es glomerular y debe ser evaluado por un nefrólogo; si no es glomerular puede deberse a infecciones de vías urinarias, hiperplasia prostática, urolitiasis, cánceres. Sospechando causas no glomerulares los estudios a realizar dependerán de la presencia de factores de riesgo y el grado de hematuria. Estos pueden ser una ecografía renal más cistoscopia o una cistoscopia más tomografía. (provisto por Infomedic International)

Asymptomatic microscopic hematuria occurs when a urinalysis detects ≥ 3 red blood cells per high-power field and is not accompanied by any symptoms; such analysis should be repeated on a second or third occasion to determine if we are facing a real microscopic hematuria, and is not due to a benign cause such as trauma, ejaculation, menstruation, strenuous exercise before the test. The approach to this condition will depend on the etiology, if the urinalysis also shows casts, proteinuria and has arterial hypertension or renal failure the cause is glomerular and should be evaluated by a nephrologist; if it is not glomerular it may be due to urinary tract infections, prostatic hyperplasia, urolithiasis, cancers. Suspecting non-glomerular causes the studies to be performed will depend on the presence of risk factors and the degree of hematuria. These can be a renal ultrasound plus cystoscopy or cystoscopy plus tomography. (provided by Infomedic International)

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Urinary bladder with concurrent colonic melanoma is an exceptionally uncommon occurrence, posing a diagnostic challenge for clinicians. While rare, it warrants consideration as a potential differential diagnosis, particularly in patients without a history of melanoma who present with persistent hematuria due to its aggressive nature. We present a case of a 55-year-old female with malignant melanoma involving the colon and urinary bladder presenting with hematuria. Given the scarcity of cases and variability in clinical management approaches, there is a pressing need for research efforts to establish standardized protocols and conduct trials to guide clinical practice in this rare entity.

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INTRODUCTION: IgA nephropathy is the most common glomerulopathy in the world, it has a wide clinical expression, from asymptomatic to rapidly progressive glomerulonephritis. The definitive diagnosis is renal biopsy, within which the IgA pattern can be identified, including thrombotic microangiopathy. CLINICAL CASE: 28-year-old female patient, with a history of preeclampsia in the last pregnancy, presents high blood pressure, hematuria and proteinuria. Study begins with initially negative results. Renal biopsy confirms IgA nephropathy with thrombotic microangiopathy. DISCUSSION: Vascular damage is underestimated in IgA nephropathy. Thrombotic microangiopathy can be associated with various clinical manifestations, however when it is associated with IgA Nephropathy it is usually associated with proteinuria, arterial hypertension and elevation of creatinine. In the presence of microangiopathy, secondary causes must be ruled out. In general, there is no pathognomonic serological marker. Eventually patients could benefit from the use of eculizumab. CONCLUSION: IgA nephropathy is the most common glomerulopathy worldwide; there is a wide range of clinical presentations, among which thrombotic microangiopathy can be found. This presentation is associated with a higher risk of progression to end-stage renal disease.

INTRODUCCIÓN: La nefropatía por IgA es la glomerulopatía más frecuente en el mundo, tiene una amplia expresión clínica, desde asintomática hasta glomerulonefritis rápidamente progresivas. El diagnóstico definitivo es la biopsia renal, dentro de las cuales se puede identificar el patrón de la IgA, dentro de los cuales está la microangiopatía trombótica. CASO CLÍNICO: Paciente femenina 28 años, con antecedentes de preeclampsia en último embarazo, presenta hipertensión arterial, hematuria y proteinuria. Se inicia estudio con resultados inicialmente negativos. Biopsia renal confirma nefropatía por IgA con microangiopatía trombótica. DISCUSIÓN: En la nefropatía por IgA se subestima el daño vascular. La microangiopatía trombótica se puede asociar con varias manifestaciones clínicas, sin embargo, cuando está asociada a NIgA suele estar asociado con proteinuria, hipertensión arterial y elevación y creatinina. Ante la presencia de microangiopatía, se deben descartar causas secundarias de la misma. En general no existe un marcador serológico patognomónico. Eventualmente los pacientes se podrían beneficiar del uso de eculizumab. CONCLUSIÓN: La nefropatía por IgA es la glomerulopatía más frecuente a nivel mundial, existe una gran gama de presentaciones clínicas, dentro de las cuales se puede encontrar microangiopatía trombótica. Esta última presentación se asocia con mayor riesgo de progresión a enfermedad renal en etapa terminal.

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PURPOSE: To assess the incidence of the most common intra- and early postoperative complications following RIRS in a large series of patients with kidney stones. METHODS: We conducted a retrospective analysis of patients with kidney stones who underwent RIRS across 21 centers from January 2018 to August 2021, as part of the Global Multicenter Flexible Ureteroscopy Outcome (FLEXOR) Registry. RESULTS: Among 6669 patients undergoing RIRS, 4.5% experienced intraoperative pelvicalyceal system bleeding without necessitating blood transfusion. Only 0.1% of patients, required a blood transfusion. The second most frequent intraoperative complication was ureteric injury due to the ureteral access sheath requiring stenting (1.8% of patients). Postoperatively, the most prevalent early complications were fever/infections requiring antibiotics (6.3%), blood transfusions (5.5%), and sepsis necessitating intensive care unit admission (1.3%). In cases of ureteric injury, a notably higher percentage of patients exhibited multiple stones and stone(s) in the lower pole, and these cases were correlated with prolonged lasing and overall surgical time. Hematuria requiring a blood transfusion was associated with an increased prevalence of larger median maximum stone diameters, particularly among patients with stones exceeding 20 mm. Furthermore, these cases exhibited a significant prolongation in surgical time. Sepsis necessitating admission to the intensive care unit was more prevalent among the elderly, concomitant with a significantly larger median maximum stone diameter. CONCLUSIONS: Our analysis showed that RIRS has a good safety profile but bleeding requiring transfusions, ureteric injury, fever, and sepsis are still the most common complications despite advancements in technology.

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INTRODUCTION: To investigate the actual cost of hematuria evaluation using nationally representative claims data, given that the workup for hematuria burdens the healthcare system with significant associated costs. We hypothesized that evaluation with contrast-enhanced computed tomography (CT) confers more cost to hematuria evaluation than renal ultrasound (US). METHODS: Using a national, privately insured database (MarketScan), we identified all individuals with an incident diagnosis of hematuria. We included patients who underwent cystoscopy and upper tract imaging within 3 months of diagnosis. We tabulated the costs of the imaging study as well as the total healthcare cost per patient. A multivariable model was developed to evaluate patient factors associated with total healthcare costs. RESULTS: We identified 318,680 patients with hematuria who underwent evaluation. Median costs associated with upper tract imaging were $362 overall, $504 for CT with contrast, $163 for US, $680 for magnetic resonance imaging (MRI), $283 for CT without contrast, and $294 for retrograde pyelogram. Median cystoscopy cost was $283. Total healthcare costs per patient were highest when utilizing MRI and CT imaging. When adjusted for comorbidities, the use of any imaging other than ultrasound was associated with higher costs. CONCLUSIONS: In this nationally representative analysis, hematuria evaluation confers a significant cost burden, while the primary factor associated with higher costs of screening was imaging type. Based upon reduced cost of US-based strategies, further investigation should delineate its cost-effectiveness in the diagnosis of urological disease.

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IgA nephropathy is the most common primary glomerulonephritis worldwide, and an important cause of kidney failure, as 20-40% of patients progress to renal replacement therapy 20-30 years after diagnosis. Its clinical presentation ranges from isolated microscopic hematuria to nephrotic syndrome, and even to a rapidly progressive course. Ethnicity and epigenetics play a key role in its clinical aggressiveness. Selection of patients at risk needing immunosuppressive treatment is a challenge for the nephrologist. Some active and chronic kidney lesions detected on kidney biopsy have been demonstrated to have prognostic value according to the Oxford Classification of IgA nephropathy, later validated by numerous studies. However, KDIGO 2021 guidelines still consider persistent proteinuria > 1 g/24 h to be the most relevant risk factor for the progression of IgA nephropathy and the only one requiring immunosuppressive treatment. KDIGO guidelines have proposed a therapeutic algorithm, but many patients present peculiar characteristics that are not addressed by the current guidelines, pointing to the need for alternative approaches. In these cases, a tailored approach to each patient should be followed in which clinical, histological, laboratory, social and ethical aspects must be considered. In this manuscript we present three cases of IgA nephropathy from different countries, highlighting many of the aspects encountered in clinical practice that illustrate an individualized approach to the treatment of these patients.

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Resumo Objetivo Analisar e sintetizar as evidências científicas disponíveis sobre o cateterismo urinário e as técnicas utilizadas para prevenir a hematúria no esvaziamento da bexiga, na retenção urinária aguda e crônica, em adultos e idosos. Métodos Revisão integrativa realizada nas bases de dados Pubmed, LILACS, Embase, Cochrane, Web of Science e Scopus; e busca manual nas listas de referências dos estudos incluídos. Um período ilimitado foi usado para revisar estudos em português, inglês, francês, alemão e espanhol. Aplicado estratégia PICOS na elaboração da pergunta de pesquisa e instrumento Joanna Briggs Institute (JBI) para avaliar qualidade metodológica dos estudos. Resultados Foram incluídos 11 estudos, com um total de 659 pacientes. A retenção urinária ocorreu principalmente em homens, tendo como principal causa a hiperplasia prostática benigna. As técnicas utilizadas para descompressão vesical, por cateterismo urinário, foram a descompressão rápida e a gradual, sendo as principais complicações, independente da técnica, hematúria e hipotensão. Os resultados mostraram que não houve diferença significativa entre as duas técnicas quanto ao desfecho prevenção da hematúria. Conclusão O esvaziamento gradual da bexiga não previne a hematúria em comparação com o esvaziamento rápido e completo. Mas os estudos, principalmente os relatos de casos, descrevem quadros clínicos que merecem atenção diante da ocorrência de hematúria após cateterismo urinário e as implicações no tratamento dos pacientes. Destaca a importância da enfermagem na identificação e prevenção do diagnóstico de Retenção Urinária, a fim de evitar intervenções posteriores e complicações clínicas, inclusive hematúria pós-cateterismo.

Resumen Objetivo Analizar y sintetizar las evidencias científicas disponibles sobre el cateterismo urinario y las técnicas utilizadas para prevenir la hematuria en el vaciado de la vejiga, en la retención urinaria aguda y crónica en adultos y personas mayores. Métodos Revisión integradora realizada en las bases de datos Pubmed, LILACS, Embase, Cochrane, Web of Science y Scopus y búsqueda manual en las listas de referencias de los estudios incluidos. Se utilizó un período ilimitado para revisar estudios en portugués, inglés, francés, alemán y español. Se aplicó la estrategia PICOS en la elaboración de la pregunta de investigación y el instrumento Joanna Briggs Institute (JIB) para evaluar la calidad metodológica de los estudios. Resultados Se incluyeron 11 estudios con un total de 659 pacientes. La retención urinaria ocurrió principalmente en hombres, principalmente a causa de la hiperplasia prostática benigna. Las técnicas utilizadas para la descompresión vesical por cateterismo urinario fueron la descompresión rápida y la gradual, y las principales complicaciones, independientemente de la técnica, fueron hematuria e hipotensión. Los resultados mostraron que no hubo diferencia significativa entre las dos técnicas respecto al resultado de prevención de la hematuria. Conclusión El vaciado gradual de la vejiga no previene la hematuria en comparación con el vaciado rápido y completo. Sin embargo, los estudios, principalmente los relatos de casos, describen cuadros clínicos que necesitan atención ante los episodios de hematuria después del cateterismo urinario y las consecuencias en el tratamiento de los pacientes. Se destaca la importancia de la enfermería en la identificación y prevención del diagnóstico de retención urinaria, a fin de evitar intervenciones posteriores y complicaciones clínicas, inclusive hematuria poscateterismo.

Abstract Objective Analyze and synthesize the available scientific evidence on urinary catheterization and techniques used to prevent hematuria in bladder emptying and acute and chronic urinary retention in adults and the elderly. Methods This integrative review was carried out in the PubMed, LILACS, Embase, Cochrane, Web of Science, and Scopus databases. Hand searching was used in the reference lists of included studies. An unlimited period was used to review the studies published in Portuguese, English, French, German, and Spanish. The PICOS strategy was applied to develop the research question and the Joanna Briggs Institute (JBI) instrument was used to assess the methodological quality of studies. Results Eleven studies were included, with a total of 659 patients. Urinary retention occurred mainly in men and the main cause was benign prostatic hyperplasia. Rapid and gradual decompressions were the techniques used for bladder decompression by urinary catheterization, and hematuria and hypotension were the main complications regardless of the technique. The results showed that there was no significant difference between the two techniques in terms of the outcome of hematuria prevention. Conclusion Gradual bladder emptying does not prevent hematuria compared to rapid and complete emptying. Case reports describe clinical conditions that deserve attention when hematuria occurs after urinary catheterization and the respective implications in the treatment of patients. We highlight the importance of nursing in identifying and preventing the diagnosis of Urinary Retention to avoid subsequent interventions and clinical complications, including post-catheterization hematuria.

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Introducción: El cáncer vesical es una enfermedad que afecta, generalmente, a pacientes masculinos de la tercera edad. Este tumor tiene dos formas principales de manifestarse: como tumor superficial y de bajo grado, o como neoplasia invasora de alto grado. La mayoría de los pacientes afectados con esta enfermedad presentan como factor de riesgo, el consumo de tabaco. Objetivo: Contribuir al conocimiento de la comunidad científica en lo relativo a los factores de riesgo y al síntoma principal asociados al cáncer vesical en pacientes adultos de la tercera edad. Métodos: Se realizó una revisión sistemática sobre el tema en las bases de datos: SciELO, EBSCO, Scopus, PubMed, y en revistas de Urología. Los artículos fueron publicados en idioma español o inglés. Se realizó un análisis del contenido para lograr la actualización teórica del tema. Conclusiones: El cáncer vesical es una enfermedad multifocal que provoca la aparición de varias neoformaciones dentro del epitelio transicional, en toda su extensión. La presencia de hematuria asintomática en los pacientes adultos fue la causa más común de consulta con el urólogo. Dentro de los factores de riesgo, el principal fue el consumo de tabaco.

Introduction: bladder cancer is a disease that generally affects elderly male patients. This tumour has two main forms of manifestation: as a low-grade superficial tumor or as a high-grade invasive neoplasm. Most of the patients affected with this disease have tobacco consumption as a risk factor. Objective: to contribute to the knowledge of the scientific community in relation to the risk factors associated with bladder cancer in elderly patients. Methods: a systematic review on the subject was carried out in SciELO, EBSCO, Scopus and PubMed databases as well as in Urology journals. Articles published in Spanish or English languages were taken into account. A content analysis was conducted to achieve a theoretical update on this topic. Conclusions: bladder cancer is a multifocal disease that causes the appearance of several neoformations within the transitional epithelium and throughout its entire length. The presence of asymptomatic hematuria in adult patients was the most common reason for consultation with the urologist. The main risk factor was tobacco consumption.

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Se presenta caso de una mujer de 70 años, con antecedentes de enfermedad renal crónica sin requerimiento dialítico que ingresa con descompensación aguda y que mejora con sesiones de hemodiálisis. Al examen físico llama la atención hematuria franca por lo que se solicita ecografía de pelvis donde aprecia vejiga distendida con coágulo en su interior de 7,2 cm. La tomografía muestra aparente tumor de pared de vejiga. La uretrocistografía confirma una cistitis crónica eosinofílica. Es manejada con hidroxicina teniendo respuesta favorable cediendo episodios de hematuria. La cistitis eosinofílica es una condición médica rara que se presenta con síntomas urinarios tales como disuria y hematuria. Es más común en niños que en adultos. El método diagnóstico es a través de una biopsia de pared vesical por cistoscopía. El manejo está dirigido a aliviar los síntomas. El interés por el caso se debe a la rareza de esta patología.

We present the case of a 70-year-old woman with a history of chronic kidney disease without dialysis who was admitted with acute decompensation and improved with hemodialysis sessions. On physical examination, frank hematuria was noticeable, therefore a pelvic ultrasound was requested, where a distended bladder with a 7.2 cm clot inside was observed. The tomography showed an apparent bladder wall tumor. Cyst urethrography confirmed chronic eosinophilic cystitis. It was managed with hydroxyzine, having a favorable response, reducing episodes of hematuria. Eosinophilic cystitis is a rare medical condition that presents with urinary symptoms such as dysuria and hematuria. It is more common in children than in adults. The diagnostic method is through a bladder wall biopsy by cystoscopy. Management is aimed at relieving symptoms. The interest in the case is due to the rarity of this pathology.

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El Síndrome de cascanueces durante el embarazo es una condición infrecuente, con pocos casos reportados en la literatura. Se presenta como consecuencia de hipertensión venosa renal unilateral por la compresión mecánica de la vena renal izquierda secundaria a los cambios por el aumento de la presión intra abdominal por el útero grávido y aumento de diámetro aórtico; se manifiesta como hematuria asintomática persistente y puede estar asociado en menor frecuencia a dolor en flanco izquierdo. El diagnóstico se realiza ante la sospecha clínica, posterior a la exclusión de otras causas más frecuentes de hematuria durante la gestación y la resolución del cuadro clínico posterior al parto; estudios como la venografía lumbar están contraindicados en la gestación. Se describe el caso de una paciente de 26 años cursando con un embarazo de 23 semanas que presentó hematuria macroscópica ureteral izquierda asociado a dolor en flanco izquierdo con resolución espontánea en el puerperio confirmando el diagnóstico de síndrome de cascanueces. (provisto por Infomedic International)

Nutcracker syndrome during pregnancy is an uncommon condition, with few cases reported in the literature. It occurs as a consequence of unilateral renal venous hypertension due to mechanical compression of the left renal vein secondary to changes due to increased intra-abdominal pressure caused by the pregnant uterus and increased aortic diameter; it manifests as persistent asymptomatic hematuria and may be associated less frequently with left flank pain. The diagnosis is made upon clinical suspicion, after exclusion of other more frequent causes of hematuria during pregnancy and resolution of the clinical picture after delivery; studies such as lumbar venography are contraindicated in pregnancy. We describe the case of a 26-year-old patient with a 23-week pregnancy who presented macroscopic left ureteral hematuria associated with left flank pain with spontaneous resolution in the puerperium, confirming the diagnosis of nutcracker syndrome. (provided by Infomedic International)

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The toxic effect of ferns of the genus of Pteris in bovines is caused by ptaquiloside, the main carcinogenic toxin. In this study, ten species of Pteris fern in different phenologic stages and plant conditions were collected in northwest Argentina. The phytochemical analysis showed the presence of Pt in the recent collected samples (adults and young plants) but not in the herbarium specimens. The results show a great variation of Pt concentration that depends on the phenologic stage, plant condition, and collection site. Pt was measured in 6-4326 µg/g concentration, with a mean concentration of 644 µg/g. No Pt was detected in eight species of Pteris collected from herbarium samples; such results may be a false negative. It is important to notice that analysis of herbarium samples for Pt may not be a reliable method to determine its presence. It is important to further understand the potential toxicity caused by these ferns because of their effect on animals, public health, and the environment.

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Fundamento: El cáncer primario de uretra se define como el tumor cuya primera lesión se localiza en la uretra; es infrecuente, el mismo representa menos del 1 % de los tumores malignos y el 5 % de los tumores malignos del sistema urinario. La extensión de este proceso a la glándula prostática genera sintomatología urinaria obstructiva e irritativa y cuadros agudos como la hematuria macroscópica. Objetivo: Presentar el caso de un paciente con cáncer primario de uretra en su variedad urotelial con hematuria macroscópica como forma clínica de presentación. Presentación del caso: Caso clínico de un paciente masculino de 75 años de edad, con hematuria macroscópica como forma clínica de presentación de cáncer primario de uretra en su variedad urotelial, el cual se diagnosticó anatomopatológicamente durante el estudio de la hematuria. Conclusiones: El caso que se presenta permite alertar a la comunidad científica que en pacientes que presentan hematuria macroscópica, sin manifestaciones urológicas obstructivas ni irritativas, también debe tenerse en cuenta el diagnóstico de cáncer uretral primario, aunque sea un signo infrecuente como forma clínica de presentación de esa enfermedad.

Background: Primary urethral cancer is defined as a tumor whose first lesion is located in the urethra; is very uncommon, represents less than 1% of malignant tumors and 5% of malignant tumors of the urinary system. The extension of this process to the prostate gland creates obstructive and irritative urinary symptoms and acute conditions such as macroscopic hematuria. Objective: To present the case of a patient with primary urethral carcinoma in its urothelial variety with macroscopic hematuria as clinical presentation. Case presentation: Clinical case of a 75-year-old male patient, with macroscopic hematuria as a clinical presentation of primary cancer of the urethra in its urothelial variety, diagnosed anatomopathologically during the hematuria study. Conclusions: The case presented alerts the scientific community that the diagnosis of primary urethral cancer should be considered in patients with macroscopic hematuria in the absence of obstructive or irritative urologic manifestations, although it is a rare sign as clinical presentation of this disease.

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Unlike other adverse drug reactions, visceral organ involvement is a prominent feature of drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome and correlates with mortality. The aim of this study was to systematically review cases published in PubMed-indexed, peer-reviewed journals in which patients had renal injury during the episode of DRESS syndrome (DS). We found 71 cases, of which 67 were adults and 56% were males. Female sex was associated with higher mortality. Chronic kidney disease (CKD) was present in 14% of patients who developed acute kidney injury (AKI) during DS. In 21% of cases, the kidneys were the only visceral organ involved, while 54% of patients had both liver and kidney involvement. Eosinophilia was absent in 24% of patients. The most common classes of medication associated with renal injury in DS were antibiotics in 34%, xanthine oxidase inhibitors in 15%, and anticonvulsants in 11%. Among antibiotics, vancomycin was the most common culprit in 68% of patients. AKI was the most common renal manifestation reported in 96% of cases, while isolated proteinuria or hematuria was present in only 4% of cases. In cases with AKI, 88% had isolated increase in creatinine and decrease in glomerular filtration (GFR), 27% had AKI concomitantly with proteinuria, 18% had oliguria, and 13% had concomitant AKI with hematuria. Anuria was the rarest manifestation, occurring in only 4% of patients with DS. Temporary renal replacement therapy was needed in 30% of cases, and all but one patient fully recovered renal function. Mortality of DS in this cohort was 13%, which is higher than previously reported. Medication class, latency period, or pre-existing CKD were not found to be associated with higher mortality. More research, particularly prospective studies, is needed to better recognize the risks associated with renal injury in patients with DS. The development of disease-specific biomarkers would also be useful so DS with renal involvement can be easier distinguished from other eosinophilic diseases that might affect the kidney.

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La hematuria en pediatría responde habitualmente a etiologías benignas. Una causa poco frecuente es el síndrome de cascanueces, que se define como la compresión de la vena renal izquierda entre la aorta y la arteria mesentérica superior, que deriva en una presión elevada en la vena renal izquierda con el desarrollo de venas colaterales y dilataciones varicosas. La prevalencia de este síndrome se desconoce. Cuando es sintomático ocasiona hematuria, proteinuria y dolor pélvico crónico. En la pubertad, el crecimiento rápido y el desarrollo de los cuerpos vertebrales pueden producir un estrechamiento del ángulo entre la aorta y la arteria mesentérica superior. Se describe el caso de una adolescente con diagnóstico de carcinoma mucoepitelial metastásico óseo múltiple que presenta hematuria anemizante. Se arribó al diagnóstico de síndrome de cascanueces y se discutieron las opciones de tratamiento. Finalmente, con el uso de realce del calzado para corrección de la escoliosis, se atenuó significativamente la hematuria. (AU)

In pediatrics, hematuria usually responds to benign etiologies. A rare cause is nutcracker syndrome, defined as compression of the left renal vein between the aorta and the superior mesenteric artery, resulting in elevated pressure in the left renal vein with the development of collateral veins and varicose dilatation. The prevalence of this syndrome is unknown. When symptomatic, it causes hematuria, proteinuria, and chronic pelvic pain. At puberty, the rapid growth and development of the vertebral bodies can produce a narrowing of the angle between the aorta and the superior mesenteric artery.We describe the case of a teenage girl diagnosed with multiple metastatic mucoepithelial carcinoma of bone who presented anemia-producing hematuria. The diagnosis of nutcracker syndrome was arrived at with consideration of the therapeutic options. Finally, with shoe enhancement for scoliosis correction, hematuria was significantly lessened. (AU)

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RESUMEN La hemofilia A adquirida es un trastorno hemorrágico poco frecuente a nivel mundial, y se caracteriza por la presencia de autoanticuerpos inhibidores dirigidos hacia un factor de la coagulación, en la mayoría de ocasiones el factor VIII. Las etiologías son variadas, entre las que se encuentra el posparto. Se presenta el caso de una paciente de 34 años con dolor lumbar, hematuria y hematoma en región glútea derecha, sin antecedentes previos de sangrado. Por extensión de las manifestaciones hemorrágicas es transferida al servicio de emergencia. Los exámenes auxiliares de perfil de coagulación, prueba de mezclas y medición de los títulos de inhibidores del factor VIII permitieron confirmar el diagnóstico. El caso resalta la importancia de considerar esta patología en una paciente puérpera con persistencia de sangrado por herida operatoria, hematoma extenso y sin historia de sangrado previo.

ABSTRACT Acquired hemophilia A is a rare bleeding disorder worldwide, characterized by the presence of inhibitory autoantibodies directed against a coagulation factor, most often factor VIII. There are several possible causes, and it can occur during the postpartum period. We present the case of a 34-year-old female patient with back pain, hematuria and a right gluteal hematoma, with no previous history of bleeding. She was transferred to the emergency department due to the extension of the hemorrhagic manifestations. Diagnosis was confirmed with the coagulation profile, mixing test and the assessment of factor VIII inhibitor tier. The case highlights the importance of considering this condition in a postpartum patient with persistent postoperative bleeding, extensive hematoma and no history of previous bleeding.

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Introducción: la esquistosomiasis es la infección por trematodos más importante a nivel global. El carcinoma de células escamosas constituye el 2 % de todos los tipos histológicos de cáncer vesical; sin embargo, la incidencia de esta variedad en países endémicos de esquistosomiasis es mayor. Objetivo: evaluar la relación entre la esquistosomiasis y el cáncer de vejiga en pacientes del Hospital Central de Nampula. Materiales y métodos: se realizó un estudio observacional, descriptivo y transversal en el período comprendido entre enero de 2014 y diciembre de 2020. Los pacientes se dividieron en grupos etarios, por intervalos de 10 años. Se tomaron muestras de biopsias de tumores de vejiga, clasificándose por tipo histológico, además de los hallazgos relacionados con infestación por esquistosomiasis y formas de presentación del cáncer de vejiga. El universo estuvo constituido por 184 pacientes, y la muestra se conformó por 135 casos. Resultados: se comprobó que el mayor número de pacientes con cáncer de vejiga es del sexo masculino; el tipo histológico más frecuente fue el carcinoma de células escamosas, representando un 84,3 % del total. La cistitis, la presencia de esquistosomas, y sus huevos estuvieron presentes en casi todas las biopsias realizadas. Sus formas de presentación más frecuente fueron la cistitis, la hematúrica y la dolorosa. Conclusiones: el cáncer de vejiga mostró una mayor incidencia en las edades comprendidas entre 30 y 69 años. El carcinoma de células escamosas fue el más frecuente, y su relación con la cistitis y la infección por esquistosomas estuvo presente en más del 90 % de las biopsias.

Introduction: schistosomiasis is the most important trematode infection globally. Squamous cell carcinoma constitutes 2% of all the histological types of bladder cancer; however, the incidence of this variety of cancer in squistosomiasis-endemic countries is higher. Objective: to evaluate the relationship between squistosomiasis and bladder cancer in patients from the Central Hospital of Nampula. Materials and methods: a cross-sectional descriptive observational study was carried in the period between January 2014 and December 2020. Patients were divided into age-groups, by 10-year intervals. Biopsy samples of bladder tumors were taken, classified by histological type, in addition to findings related to squistosomiasis infestations and bladder cancer presentation forms. The universe consisted of 184 patients and the sample of 135 cases. Results: it was found that the largest number of patients with bladder cancer is male; squamous cell carcinoma is the most frequent histological type, representing 84.3% of the total. Cystitis, schistosome and their eggs were present in almost all the biopsies performed. Its most frequent presentation forms were hematuric and painful cystitis. Conclusions: bladder cancer showed higher incidence at the ages between 30 and 69 years. The squamous cell carcinoma was the most frequent, and its relationship with cystitis and schistosome infection was present in more than 90% of biopsies.

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INTRODUCTION: Clean intermittent catheterization (CIC) is associated with an increased risk of urinary tract infections (UTI), urethral trauma, urethral stenosis, hematuria, and pain. The first catheters were developed of polyvinyl carbon (PVC). Several types of catheters have been developed to reduce these complications, such as those with hydrophilic coating. OBJECTIVE: To conduct a systematic review and meta-analysis to evaluate the effectiveness of hydrophilic coated catheters compared to uncoated catheters on the rate of UTI in patients using CIC. METHODOLOGY: A systematic literature search was performed in OVID, Embase, Scopus, Web of Science, PubMed, and CENTRAL databases. Randomized controlled trials (RCTs) or randomized crossover trials comparing UTI and hematuria rates in patients using hydrophilic vs. non-hydrophilic catheters for CIC were identified. The selected trials were evaluated for risk of bias using the "Revised Cochrane risk-of-bias tool for randomized trials (RoB 2)." The results were expressed as a risk ratio (RR) with a 95% confidence interval (CI), under a random-effects model. Data were analyzed using Review Manager 5.4 software. RESULTS: Nine studies with a total of 525 patients in CIC were analyzed. Overall, the use of hydrophilic catheters had a lower risk of UTIs compared to uncoated catheters (RR = 0.78; 95% CI 0.62-0.97; I2 = 37%). Five of the studies include patients > 18 years, showing a reduction of UTIs with the use of hydrophilic catheters (RR = 0.83; 95% CI 0.74-0.93; I2 = 0%). There was no difference in UTI development when comparing single-use uncoated vs hydrophilic catheters. However, heterogeneity was high (RR = 0.77; 95% CI 0.59-1.00; I2 = 57%). Regarding hematuria risk reduction, we were unable to identify differences between the use of hydrophilic catheters compared to uncoated catheters (RR = 1.02; 95% CI 0.66-1.60). CONCLUSION: We found a risk reduction of UTIs associated with using hydrophilic catheters in adults, with low heterogeneity. Regarding hematuria, significant differences were not proved. We do not find a significant difference in UTI risk reduction in the pediatric population. Urethral trauma presence could not be meta-analyzed due to a lack of information reported.

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