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Introducción: la esclerosis múltiple (EM), enfermedad crónica del sistema nervioso (SNC), compromete significativamente la cognición. Su prevalencia en Paraguay es 9,2/100.000 habitantes, 72% con recaída remisión (EMRR) e incidencia de 2-3mujeres/hombre, afecta más a personas en edad productiva, con altos costos económicos y afectivos. Objetivos: caracterizar al paciente con EMRR, evaluar sus funciones ejecutivas (FEs) con BaNFE-2; establecer valores de corte ajustados al país. Metodología: con fundamento en teoría de la neurociencia cognitiva, diseño no experimental, cuantitativo, descriptivo, empírico, retrospectivo y transversal; técnica psicométrica y entrevista neuropsicológica en una muestra por conveniencia de 40 pacientes, 82,5% mujeres y edad 25-55 años (37,78±7,89). Resultados: se reportaron datos demográficos y clínicos, se caracterizaron las escalas de BaNFE-2 cuya consistencia interna resultó significativa. Se obtuvo 52,5% de alteración en la escala prefrontal y 42,5% en FEs; relaciones significativas con escolaridad, discapacidad física (DF), cantidad de brotes y deterioro cognitivo (DC); diferencias significativas por sexo, escolaridad, DF y DC. Se calcularon puntuaciones tipificadas por escolaridad, z<-1 establece el corte entre normalidad y alteración. Conclusión: las pruebas de BaNFE-2 perfilan la afectación del tiempo de ejecución, atención, memoria de trabajo y FEs. Este estudio aporta baremos ajustados al país y abre una novedosa línea de investigación aplicando BaNFE-2 en EM.

Introduction: Multiple sclerosis (MS) is a chronic, neurodegenerative, inflammatory disease of the central nervous system (CNS) that significantly compromises cognitive functions. In Paraguay, it occurs with a prevalence of 9.2/100,000 inhabitants, 72% in the clinical form of relapsing remission (RRMS) and an incidence of 2 to 3 women/men, affecting more people of productive age with high economic and emotional costs. Objectives: To characterize the Paraguayan patient with RRMS, to assess the state of their executive functions (EFs) with the BaNFE-2 battery, and to establish cut-off values adjusted to the country. Methods: Research based on the theory of cognitive neuroscience of non-experimental, quantitative and descriptive design for analytical purposes. It is empirical, retrospective and cross-sectional. The psychometric technique and neuropsychological interview were used in a convenience sample of 40 patients aged 25 to 55 (37.78 ± 7.89) and 82.5% women. Results: Demographic and clinical data of the participants were reported. The BaNFE-2 coded and normalized scales were statistically characterized, the internal consistency of which was significant. 52.5% of the alteration was obtained in the anterior prefrontal scale and 42.5% in FEs; there are significant relationships with schooling, physical disability (PD), number of outbreaks and cognitive impairment (CI); there were also significant differences by sex, education, PD and CI. Standardized scores adjusted for schooling were calculated such that z<-1 establishes the cutoff between normality and abnormality. Conclusion: BaNFE-2 battery tests profile the affectation of execution time, attention, working memory, and FEs. This study provides the adjusted scales for the country and opens a new line of research applying the BaNFE-2 battery in people with MS.

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BACKGROUND: There is no data regarding COVID-19 in Multiple Sclerosis (MS) and neuromyelitis optica spectrum disorder (NMOSD) patients in Latin America. OBJECTIVE: The objective of this study was to describe the clinical characteristics and outcomes of patients included in RELACOEM, a LATAM registry of MS and NMOSD patients infected with COVID-19. METHODS: RELACOEM is a longitudinal, strictly observational registry of MS and NMOSD patients who suffer COVID-19 and Dengue in LATAM. Inclusion criteria to the registry were either: (1) a biologically confirmed COVID-19 diagnosis based on a positive result of a COVID-19 polymerase chain reaction (PCR) test on a nasopharyngeal swab; or (2) COVID-19-typical symptoms (triad of cough, fever, and asthenia) in an epidemic zone of COVID-19. Descriptive statistics were performed on demographic and clinical variables. The cohort was later stratified for MS and NMOSD and univariate and multivariate logistic regression analysis was performed to identify variables associated with hospitalizations/intensive critical units (ICU) admission. RESULTS: 145 patients were included in the registry from 15 countries and 51 treating physicians. A total of 129 (89%) were MS patients and 16 (11%) NMOSD. 81.4% patients had confirmed COVID-19 and 18.6% were suspected cases. 23 (15.8%) patients were hospitalized, 9 (6.2%) required ICU and 5 (3.4 %) died due to COVID-19. In MS patients, greater age (OR 1.17, 95% CI 1.05 - 1.25) and disease duration (OR 1.39, 95%CI 1.14-1.69) were associated with hospitalization/ICU. In NMOSD patients, a greater age (54.3 vs. 36 years, p=<0.001), increased EDSS (5.5 vs 2.9, p=0.0012) and disease duration (18.5 vs. 10.3 years, p=0.001) were significantly associated with hospitalization/ICU. CONCLUSION: we found that in MS patients, age and disease duration was associated with hospitalization and ICU admission requirement, while age, disease duration and EDSS was associated in NMOSD.

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The idiopathic inflammatory demyelinating disease (IIDD) spectrum has been investigated among different populations, and the results have indicated a low relative frequency of neuromyelitis optica (NMO) among multiple sclerosis (MS) cases in whites (1.2%-1.5%), increasing in Mestizos (8%) and Africans (15.4%-27.5%) living in areas of low MS prevalence. South America (SA) was colonized by Europeans from the Iberian Peninsula, and their miscegenation with natives and Africans slaves resulted in significant racial mixing. The current study analyzed the IIDD spectrum in SA after accounting for the ethnic heterogeneity of its population. A cross-sectional multicenter study was performed. Only individuals followed in 2011 with a confirmed diagnosis of IIDD using new diagnostic criteria were considered eligible. Patients' demographic, clinical and laboratory data were collected. In all, 1,917 individuals from 22 MS centers were included (73.7% female, 63.0% white, 28.0% African, 7.0% Mestizo, and 0.2% Asian). The main disease categories and their associated frequencies were MS (76.9%), NMO (11.8%), other NMO syndromes (6.5%), CIS (3.5%), ADEM (1.0%), and acute encephalopathy (0.4%). Females predominated in all main categories. The white ethnicity also predominated, except in NMO. Except in ADEM, the disease onset occurred between 20 and 39 years old, early onset in 8.2% of all cases, and late onset occurred in 8.9%. The long-term morbidity after a mean disease time of 9.28±7.7 years was characterized by mild disability in all categories except in NMO, which was scored as moderate. Disease time among those with MS was positively correlated with the expanded disability status scale (EDSS) score (r=0.374; p=<0.001). This correlation was not observed in people with NMO or those with other NMO spectrum disorders (NMOSDs). Among patients with NMO, 83.2% showed a relapsing-remitting course, and 16.8% showed a monophasic course. The NMO-IgG antibody tested using indirect immunofluorescence (IIF) with a composite substrate of mouse tissues in 200 NMOSD cases was positive in people with NMO (95/162; 58.6%), longitudinally extensive transverse myelitis (10/30; 33.3%) and bilateral or recurrent optic neuritis (8/8; 100%). No association of NMO-IgG antibody positivity was found with gender, age at onset, ethnicity, early or late onset forms, disease course, or long-term severe disability. The relative frequency of NMO among relapsing-remitting MS (RRMS) + NMO cases in SA was 14.0%. Despite the high degree of miscegenation found in SA, MS affects three quarters of all patients with IIDD, mainly white young women who share similar clinical characteristics to those in Western populations in the northern hemisphere, with the exception of ethnicity; approximately one-third of all cases occur among non-white individuals. At the last assessment, the majority of RRMS patients showed mild disability, and the risk for secondary progression was significantly superior among those of African ethnicity. NMO comprises 11.8% of all IIDD cases in SA, affecting mostly young African-Brazilian women, evolving with a recurrent course and causing moderate or severe disability in both ethnic groups. The South-North gradient with increasing NMO and non-white individuals from Argentina, Paraguay, Brazil and Venezuela confirmed previous studies showing a higher frequency of NMO among non-white populations.

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BACKGROUND: The hypothalamic luteinizing hormone-releasing hormone (LHRH) is well known for its role in the control of pituitary gonadotropin secretion and it has demonstrated a direct antiproliferative effect on some cancer cell lines of LHRH and its synthetic analogs. The study was designed to assess whether administration of the LHRH analog (goserelin) has any effect on the expression of the vascular endothelial growth factor (VEGF) and the epidermal growth factor receptor (EGFR) in rats with N-nitroso-N-methylurea (NMU)-induced-mammary tumors " in vivo". MATERIALS AND METHODS: The animals with tumors were assessed after acute or chronic treatment with goserelin, and in all the animals VEGF and EGFR expression was examined both in plasma and tumor homogenates by enzyme immunoassay. RESULTS: The basal plasma values of VEGF were lower in the healthy control group than in rats with NMU-induced tumors ( P = 0.025). Following acute treatment with goserelin, VEGF expression in plasma increased above basal levels after 60 min ( P = 0.05) and dropped during chronic treatment. Likewise, in the tumor homogenate the mean VEGF expression was higher at 60 min post-goserelin administration than the basal levels, although VEGF expression then diminished at 90 min. Plasma EGFR expression was higher in rats with NMU-induced tumors than in healthy controls ( P Conclusions: The results allow us to conclude that goserelin may exert a short-term stimulatory effect on the release of VEGF, as well as a long-term inhibitory effect on VEGF but not EGFR expression.

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The cannabinoid receptor-1 (CNR-1) and endogenous agonists of this receptor are present in the central and peripheral nervous systems including the gastrointestinal nervous system. The surgically rejected specimens of human colorectal cancers and paired normal tissues were studied to detect mutations in the CNR1 gene by sequencing method. The results were compared to clinicopathological parameters and correlated with overall survival time. Sixty-three colorectal cancer patients, who underwent surgical excision of colorectal carcinoma, were included in this study. The coding region of the CNR1 gene was studied: a nucleotide change (G-->A) at position 1359 was identified by direct sequencing of PCR. Thirty-eight patients had the G/G genotype (wild type) in tumor areas and 25 patients had G/A heterozygous or A/A homozygous genotype. Univariate analysis revealed 2 independent variables associated with CNR1 gene mutation. The results show that the patients with Dukes stage C and D had a 2.9 times (p = 0.04) and patients that were lymph node positive had 2.8 times (p = 0.05) greater probability of nucleotide change in CNR1 gene. Genotype G/A plus A/A had a shorter overall survival time than G/G wild-type patients (p < 0.05). Indeed nontumor paired colorectal tissues showed nucleotide change. A large number of patients with mutation in the CNR1 gene were observed. These preliminary findings highlight the importance of further studies in the use of cannabinoid analogs as receptor ligands to analyze potential therapeutic effects.

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AIMS AND BACKGROUND: Cannabinoid receptors have an impact on gastrointestinal function, but it remains unknown whether mutations may affect tumor susceptibility in patients with esophageal carcinoma. The aim of this study was to determine mutation in the cannabinoid receptor-1 (CNR1) gene and its relation to vascular endothelial growth factor (VEGF) expression as an angiogenic and poor prognostic factor. METHODS: 179 esophageal tissue samples from 69 patients (29 with esophageal cancer and 40 controls) were studied. CNR1 gene mutation (1359 G --> A in codon 453) was detected with PCR, using the MspI restriction enzyme. VEGF was determined by immunoassay. RESULTS: Genotyping in control patients' samples revealed that 24/40 were G/G wild type and 16/40 were G/A; no samples were A/A. Of the 139 tissue samples from the 29 esophageal cancer patients, 15 were G/G homozygous, 85 G/A heterozygous, 11 had an A/A genotype and 28 were without amplification. In the normal tissue adjacent to tumor, some mutations were observed. The overall survival time was reduced in patients with the A/A type in all their 5 samples, in comparison to G/G type (P = 0.04, chi-square: 4.26). VEGF expression was higher in tumor than nontumor areas (P < 0.025). VEGF expression was not correlated with survival time. CONCLUSIONS: Our preliminary findings in esophageal tissue showed a high frequency of G --> A mutation in the CNR1 gene. No correlation between VEGF expression and gene receptor mutation was found. Patients with mutation in all their samples had a reduced survival time.

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Drug resistance has become a major problem in the treatment of tuberculosis. Pulmonary resection in combination with chemotherapy appears to be an effective measure for the treatment of multi-drug resistant pulmonary tuberculosis. A retrospective review was performed of the medical and laboratory findings of 28 patients with multi-drug resistant tuberculosis who underwent pulmonary resection for pulmonary tuberculosis between January 1990 and December 2000 at La Maria Hospital, Medellín. Twenty-one of them had medical therapy before surgery; 14 patients underwent upper lobectomy and 10 patients pneumonectomy). The AFB negative sputum conversion rate was 88.9% (25/27) after surgery, during an average of 6 weeks. Bacteriological relapses were confirmed in 6 of 27, 4 of these 6 had AFB negative sputum. Twenty-eight patients had medical therapy after surgery. For selected patients, pulmonary resection in combination with chemotherapy should be considered an effective measure for treatment of multi-drug resistant pulmonary tuberculosis.

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La aparición de Mycobacterium tuberculosis multirresistente constituye un serio problema para el control de la tuberculosis, por lo que se ha considerado que la resección quirúrgica del tejido pulmonar afectado, junto con el tratamiento médico adecuado, podría proporcionar la curación en algunos pacientes con tuberculosis pulmonar multiresistente. En este estudio de tipo descriptivo, retrospectivo, se evaluaron los resultados clínicos y bacteriológicos de la resección quirúrgica en un grupo seleccionado de pacientes con tuberculosis pulmonar multirresistente. Se revisaron las historias clínicas del Hospital La María de Medellín de 1990 a 2000, y se encontró que se habían sometido a cirugía 73 pacientes con diagnóstico de tuberculosis durante este periodo, 28 de los cuales tenían como indicación quirúrgica tuberculosis multirresistente (resistencia a isoniacida y rifampicina), 21 de los cuales habían recibido tratamiento prequirúrgico. En 14 (50%) se había practicado lobectomía superior y en 10 (36,7%), neumonectomía. Todos recibieron tratamiento posquirúrgico por un periodo promedio de 12,5 meses. En 88,9% (25/27) de los casos, la baciloscopia fue negativa después de 6 semanas de la cirugía y hasta finalizar el tratamiento antituberculoso; 6 pacientes presentaron nuevamente baciloscopia positiva, aunque 4 tuvieron baciloscopia negativa después de un nuevo esquema de tratamiento. Los pacientes, de acuerdo con las normas del ministerio, fueron seguidos con baciloscopia mensual y no con cultivo como es lo indicado en los casos de multirresistencia. La cirugía junto con el tratamiento médico adecuado constituye una buena alternativa de curación para algunos pacientes con tuberculosis pulmonar multirresistente.

Surgical treatment of multiresistant lung tuberculosis Drug resistance has become a major problem in the treatment of tuberculosis. Pulmonary resection in combination with chemotherapy appears to be an effective measure for the treatment of multi-drug resistant pulmonary tuberculosis. A retrospective review was performed of the medical and laboratory findings of 28 patients with multi-drug resistant tuberculosis who underwent pulmonary resection for pulmonary tuberculosis between January 1990 and December 2000 at La Maria Hospital, Medellín. Twenty-one of them had medical therapy before surgery; 14 patients underwent upper lobectomy and 10 patients pneumonectomy). The AFB negative sputum conversion rate was 88.9% (25/27) after surgery, during an average of 6 weeks. Bacteriological relapses were confirmed in 6 of 27, 4 of these 6 had AFB negative sputum. Twenty-eight patients had medical therapy after surgery. For selected patients, pulmonary resection in combination with chemotherapy should be considered an effective measure for treatment of multi-drug resistant pulmonary tuberculosis.

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La histoplasmosis, micosis sistémica del Nuevo Mundo, es adquirida por inhalación de las propágulas del hongo Histoplasma capsulatum. El compromiso primario es pulmonar, pero luego se disemina a otros órganos. Casi siempre la infección es subclínica, aunque pueden presentarse síntomas leves. Un paciente de 35 años consultó por malestar general, pérdida de peso y tos no productiva de 3 meses de evolución, así como por lesiones mucocutáneas. Los exámenes de laboratorio fueron normales, y los estudios radiológicos pulmonares mostraron algunos infiltrados intersticiales y leve compromiso hiliar. La búsqueda para bacilos BAAR fue negativa; se realizó broncoscopia y también una biopsia de mucosa oral. Esta última reveló la presencia de levaduras compatibles con H capsulatum y, posteriormente, los cultivos fueron positivos. Con el diagnóstico de histoplasmosis crónica diseminada (RCD), se inició tratamiento con ketoconazol, 200 mg/12 horas. La mejoría fue notable y a los ocho meses de tratamiento, el paciente se recuperó. La RCD se observa regularmente en pacientes adultos no inmunocomprometidos; en nuestro medio suele ser confundida con la tuberculosis. Por ello, sería importante considerar la histoplasmosis en el paciente sintomático respiratorio.

Ristoplasmosis a disorder of the New World is acquired by inhalation of the propagules produced by the fungus Histoplasma capsulatum. It is charaeterized by primary pulmonaryinvolvement that promptly disseminates to other organs. The infection is mostly subclinical but can produce minor symptoms. A 35 year-old male with no pathological records, consulted because of general malaise, weight loss and non-productive cough of 3 months duration. Two mucocutaneous lesions were also observed. Laboratory tests gave normal results ,and the lungs X-rays revealedonly minor interstitial infiltrates and a slight involvement of the hilar region. Search for acid fast bacilli proved negative; a bronchoscopy and a biopsy of the external lesions were performed. Results of the latter revealed yeast cells compatible with H capsulatum. Subsequently, cultures were positive for this fungus. With the diagnosis of chronicdisseminated histoplasmosis (CDR), treatment with ketoconazole, 200 mg BID was initiated. The patient responded and 8 months after diagnosis, he improved markedly. CDR is seen regularly in the inmunocompetent adult but its resemblance with tuberculosisleads to misdiagnosis. Consequently, the mycosis should be considered in the respiratory symptomatic adult patient.

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O objetivo do presente trabalho é o de avaliar o comportamento de um tipo de prótese rosqueada em artroplastia total do quadril, avaliando-se o comportamento clínico e o radiológico em 171 cirurgias com seguimento mínimo de dois anos em 206 pacientes, operados no período entre abril de 1989 e março de 1992.

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Se presenta la etiología de la neumopatía en pacientes con SIDA en nuestro medio, comparando dos técnicas de coloración; se estudiaron 36 pacientes con neumopatía (31%) de los 116 informados con SIDA al servicio de epidemiología del servicio seccional de Salud de Antioquia, entre Mayo de 1990 y Mayo de 1992. A todos se les hizo lavado broncoalveolar y coloración con plata metenamina modificada y calcofluor blanco, se encontró que P. carinii es el responsable del 28% de los casos de neumopatía en pacientes con SIDA. No hay ninguna característica en la presentación clínica de la neumopatía por P. carinii que lo diferencie de la causada por otros agentes etiológicos. La coloración de calcofluor blanco resultó tan confiable como la plata metenamina modificada; es más simple y es más fácil de Interpretar y de menor costo, lo que la hace de elección en nuestro medio.

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El presente trabajo pretende determinar en nuestro medio, la etiología de la enfermedad respiratoria en pacientes con SIDA, para lo cual se estudiaron 28 pacientes con prueba confirmatoria para VIH y síntomas respiratorios. Se realizó medición de DHL, gases arteriales, estudio radiológico de tórax y lavado broncoalveolar del cual se tomaron muestras para estudio microbiológico en diferentes medios; el sedimento se utilizó para coloración de micobacterias, el calco flúor blanco para P.carinii. Los principales patógenos encontrados fueron: P. carinii en nueve pacientes (32.2 por ciento), S. pneumoniae en seis (21.4 por ciento), M.tuberculosis en cinco (18 por ciento). Los hallazgos clínicos pueden orientar hacia el diagnóstico etiológico, no encontrandose relación con los exámenes paraclínicos: por esta razón pacientes con neumopatía y SIDA no deben recibir terapia empírica. Es necesario incluir en el estudio técnicas virales de diagnóstico para lograr una etiología más exacta.

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