ABSTRACT The Köppen-Geiger classification is one of the most common climate classification systems in the world. It allows classifying ecosystem distribution based on temperature and precipitation, two critical factors in climate, and vegetation cover’s sensitivity. We analyzed the dynamics and spatial consistency of agroclimatic variables in each type of Köppen- Geiger climate present in Chile, visualizing the variables’ behavior throughout the territory. Thus, we computed the trends of different climate and agroclimatic variables in each meteorological station, mapping their slope and statistical significance, and comparing their sense among all those that belong to the same climate zone. Our global trends analysis showed a thermal amplitude decrease in northern and central areas in about 12.03% and 20.3%, respectively, and an increase in south and southern areas in about 13.7% and 26.3%. A generalized increase in frost events (2.90%-16.02%) took place mainly in the country’s northern part. Results showed higher concordance percentages in stations belonging to the Köppen-Geiger type B (dry climate) and C (temperate climate). Thus, an increase in the maximum temperature occurred from north-central to south zones, a decrease in minimum temperature from north to central zone, and an increase in highlands (700-4000 m a.s.l.), central, south, and southern zone of the country. Also, a precipitation decreases and thermal amplitude increased roughly from the Coquimbo Region to the country’s central and southern zone. Variations in the agroclimatic indices’ behavior can affect yield and production of crops; thus, agroclimatic information presented here can support the zoning and selection of the cropping system.

Background: Breast cancer (BC) has a high mortality rate in developing countries due to a scarcity of early detection. Risk communication is critical to support women who face the decision to undertake BC screening. Thus, they can balance their perceived and real risk, and make informed choices. Aim: To describe experts’ views on how the provision of information related to BC screening should be made. Material and Methods: A qualitative study with focus groups with national experts was conducted. Open coding was performed. Results: Four categories on the way information about BC screening should be provided emerged: to communicate about the need of the exam; the pros and cons of the test; fear as a barrier for understanding; and involving women in the decision-making process. Conclusions: These findings emphasize the need to include risk communication strategies in the patient-provider relationship and encourage and respect women's autonomy when facing the BC screening decision.

Resumen Presentamos una base de datos pública en el SIB Colombia, producto de varios estudios sobre la diversidad y complementariedad de una comunidad de mariposas (Lepidoptera: Papilionoidea) en la reserva El Romeral, un área protegida ubicada al suroeste del Valle de Aburrá, sobre la cordillera Central en el departamento de Antioquia, Colombia. Se reporta la presencia de 69 especies, 40 géneros, 12 subfamilias y 5 familias de mariposas diurnas en ecosistemas de bosque de niebla, entre los 2250 y 2878 m s.n.m, incluyendo registros únicos y especies endémicas. La información se encuentra asociada a especímenes y a secuencias de código de barras en GenBank.

Abstract We present a public database at SIB Colombia, the product of several studies about the diversity and complementarity of a butterfly community (Lepidoptera: Papilionoidea) in the El Romeral reserve, a protected area located southwest of the Aburrá Valley on the Central Cordillera in the department of Antioquia, Colombia. We report 69 species, 40 genera, 12 subfamilies and 5 families of butterflies in high Andean ecosystems, between 2250 and 2878 m a.s.l., including unique records and endemic species. The information is associated with specimens and barcode sequences in GenBank.

Resumo O câncer gástrico (CG) é um problema de saúde pública com alta incidência e mortalidade na Colômbia, devido ao seu diagnóstico tardio e às barreiras ao tratamento curativo, o que deixa os cuidados paliativos (CP) como única opção terapêutica. O objetivo é descrever as barreiras aos cuidados de CP percebidos pelo adulto com CG, cuidador e médico assistente em Santander, Colômbia. Um estudo qualitativo foi realizado com a análise da teoria fundamentada (Strauss e Corbin), por meio de entrevistas semiestruturadas, após amostragem por conveniência, constatou-se que as barreiras de acesso foram; administrativo, econômico, cultural, conhecimento, comunicação, institucional e geográfico; as estratégias para superá-los: programas de triagem, vigilância governamental e investimento em saúde. Em conclusão, o acesso à PC deve ser melhorado, eliminando barreiras ao acesso oportuno e abrangente e fortalecendo as políticas de saúde e educação, com a participação ativa do Estado e da comunidade para garantir a assistência à saúde.

Abstract Gastric cancer (GC) is a public health issue with high incidence and mortality in Colombia due to tardy diagnosis and barriers to access to curative treatment; this leaves palliative care (PC) as the only option. Our aim is to describe the access barriers to PC perceived by adults with GC, caregivers and physician in Santander, Colombia. A qualitative study was carried out with the analysis of the grounded theory (Strauss and Corbin), through semi-structured interviews, after sampling for convenience we found that the access barriers were: administrative, economic, cultural, knowledge, communication, institutional and geographical; strategies to overcome barriers: screening programs, governmental surveillance, and investment in health. In conclusion, access to PC requires remove barriers to timely and integral access and strengthen health and education policies to facilitate procedures and services that ensure the attention required by the adult with GC.

Resumo O câncer gástrico (CG) é um problema de saúde pública com alta incidência e mortalidade na Colômbia, devido ao seu diagnóstico tardio e às barreiras ao tratamento curativo, o que deixa os cuidados paliativos (CP) como única opção terapêutica. O objetivo é descrever as barreiras aos cuidados de CP percebidos pelo adulto com CG, cuidador e médico assistente em Santander, Colômbia. Um estudo qualitativo foi realizado com a análise da teoria fundamentada (Strauss e Corbin), por meio de entrevistas semiestruturadas, após amostragem por conveniência, constatou-se que as barreiras de acesso foram; administrativo, econômico, cultural, conhecimento, comunicação, institucional e geográfico; as estratégias para superá-los: programas de triagem, vigilância governamental e investimento em saúde. Em conclusão, o acesso à PC deve ser melhorado, eliminando barreiras ao acesso oportuno e abrangente e fortalecendo as políticas de saúde e educação, com a participação ativa do Estado e da comunidade para garantir a assistência à saúde.

Abstract Gastric cancer (GC) is a public health issue with high incidence and mortality in Colombia due to tardy diagnosis and barriers to access to curative treatment; this leaves palliative care (PC) as the only option. Our aim is to describe the access barriers to PC perceived by adults with GC, caregivers and physician in Santander, Colombia. A qualitative study was carried out with the analysis of the grounded theory (Strauss and Corbin), through semi-structured interviews, after sampling for convenience we found that the access barriers were: administrative, economic, cultural, knowledge, communication, institutional and geographical; strategies to overcome barriers: screening programs, governmental surveillance, and investment in health. In conclusion, access to PC requires remove barriers to timely and integral access and strengthen health and education policies to facilitate procedures and services that ensure the attention required by the adult with GC.

Objetivo: Comparar la identificación del Staphylococcus aureus meticilino resistente (SAMR) con concentración inhibitoria mínima (CIM) elevada a la vancomicina ( = 1,5 mg/L) obtenida mediante las pruebas de suceptibilidad realizadas con equipos automatizados y el método manual de E-test. Materiales y métodos: Determinación de la CIM a la vancomicina por los métodos de E-test, MicroScan ® y Vitek-2 ® en 118 aislamientos de SAMR identificados entre 2009 y 2010 en un hospital de tercer nivel de Bogotá, Colombia. Resultados: La prevalencia de SAMR con CIM = 1,5 mg/L fue de 92,3% por E-test, 38,9% por MicroScan ® y 5% por Vitek-2 ® . Las CIM de un mismo aislamiento, obtenidas por los 3 métodos fueron significativamente diferentes según la prueba de Friedman (P < 0,001). La correlación entre los 3 métodos fue escasa o nula. Conclusiones: El método de E-test permite identificar el mayor número de cepas de SAMR con CIM elevada a la vancomicina. Teniendo en cuenta que esta prueba es la que se relaciona mejor con el aumento en el riesgo de mortalidad, los laboratorios de microbiología deberían considerar su realización en aislamientos provenientes de sangre.

Objective: The aim of this study is to compare the methods of identification of methicillin-resistant Staphylococcus aureus (MRSA) with high vancomycin minimum inhibitory concentrations (MICs) ( = 1.5 mg/L) using automated testing methods and a manual E-test. Materials and Methods: We examined the vancomycin MIC among 118 MRSA isolates from 2009 to 2010 in a level 3 Hospital in Bogotá, Colombia, employing the E-test, MicroScan ® and Vitek-2 ® . Results: The prevalence of MRSA with MIC = 1.5 mg/L was 92.3% by E-test; 38.9% by MicroScan ® and 5% by Vitek-2 ® . The MICs obtained from the same isolate by the three methods were significantly different (P<0.001). The agreement between methods was little to null. Conclusions: The E-test method yielded the highest number of MRSA with high vancomycin MIC. This method best determines the increase in mortality risk; microbiology laboratories should consider implementing this test with blood isolates.

Introducción. La información de los registros de población de cáncer resulta de vital importancia en la planeación, prevención y manejo del cáncer. La información generada por los registros debe ser exhaustiva, válida y comparable, por lo que se recomienda hacer evaluaciones periódicas de calidad. Objetivo. Evaluar algunos aspectos relacionados con la exhaustividad y la validez de la información recolectada por los registros de población de cáncer en Colombia para estimar las cifras de cáncer en el país. Materiales y métodos. Se evaluó la información de los registros de población de Bucaramanga, Cali, Pasto y Manizales. La exhaustividad se analizó mediante las razones de mortalidad, incidencia y su relación con la supervivencia. La validez se estableció con la descripción de los casos verificados morfológicamente y los registrados en certificados de defunción. Finalmente, se describieron las inconsistencias generadas. Resultados. El análisis de exhaustividad mostró un subregistro general en los registros de Bucaramanga y Manizales, y un subregistro para algunas localizaciones en todos los registros. El análisis de validez indicó un bajo uso de los certificados de defunción como fuente de información y porcentajes importantes de inconsistencias entre la base de diagnóstico y la histología. Conclusiones. La calidad de la información de los registros de población de cáncer en Colombia puede ser mejorada al considerar fuentes adicionales de información, el uso de software especializado en captura y validación, y fortalecimiento en el registro de la mortalidad en las áreas de cobertura.

Introduction. Population-based cancer registries provide vital information for planning, prevention and cancer management. Information generated by the registries must be comprehensive, valid and comparable. Because of their importance, regular quality assessments are recommended. Objective. The quality of cancer incidence data were assessed at four population-based cancer registries in Colombia for cancer incidence estimations. Material and methods. Data collected at population-based cancer registries of Bucaramanga, Cali, Pasto, and Manizales were included. Completeness was assessed by the use of graphs in illustrating the mortality incidence ratios and their relation to the survival. Validity was evaluated by the description of morphologically verified cases, cases identified from death certificates only, and the internal consistency of the data. Results. There was a global under-coverage of cancer registration at Bucaramanga and Manizales, whereas a more specific under-coverage for certain localizations was observed in Cali and Pasto. Validity analyses established that death certificates were little used as a source of information, and some inconsistencies appeared among the data associated with the most valid basis of diagnosis and morphology. Conclusions. In Colombia, the data quality at population-based cancer registries can be further improved by considering the use of additional sources of information, such as death certificates, the use of specialized software for data capture, and automatic validation of internal consistency. Mortality certification must be improved in areas where a population-based cancer registry is operating.

Resumen. El cáncer es una causa significativa de morbi-mortalidad y conocer la magnitud del problema es posible gracias a los Registros poblacionales de cáncer (RPC). Objetivo. Describir las tasas de incidencia y mortalidad por cáncer en el área metropolitana de Bucaramanga (AMB) durante el quinquenio 2003-2007. Metodología. Los casos de cáncer invasivo primarios del período 2003-2007 se seleccionaron de la base del Registro poblacional de cáncer del área metropolitana de Bucaramanga (RPC-AMB). Los datos de población y mortalidad se obtuvieron del Departamento Administrativo Nacional de Estadística (DANE). Se estimaron tasas crudas de incidencia (TC) y mortalidad (TMC) totales y específicas por grupos de edad y sexo, y tasas de incidencia (TEE) y mortalidad (TMEE) estandarizadas. Los análisis estadísticos se hicieron con CanReg4 y Stata/IC 10.1. Resultados. Se reportaron 8.225 casos de cáncer incidentes al RPC-AMB durante el quinquenio (se excluye cáncer de piel no-melanoma), con un 54.4% de casos en mujeres. La TEE global fue de 177.6/100.000 hombres-año y 162.8/100.000 mujeres-año. Los cánceres más frecuentes para la población general fueron mama, próstata, estómago, colon y recto, y cuello uterino. La TMEE estimada en el AMB fue mayor que la cifra nacional, especialmente en los hombres. Conclusión.Las tasas globales de mortalidad por cáncer en nuestra región son más altas que el estimado nacional, lo que sugiere problemas en medidas de prevención secundaria. Las TEE de cáncer de mama y próstata aumentaron de acuerdo con las tendencias mundiales. Es necesario continuar los esfuerzos de vigilancia del cáncer.

Introduction: Cancer is an important cause of morbidity and mortality worldwide. Population-based cancer registries (PBCRs) make possible to estimate the burden of this condition. Aim: To estimate cancer incidence and mortality rates in the Bucaramanga Metropolitan Area (BMA) during 2003-2007. Methods: Incident cases of invasive cancer diagnosed during 2003-2007 were identified from the Bucaramanga Metropolitan Area PBCR (BMA-PBCR). Population counts and mortality were obtained from the Colombian National Administrative Department of Statistics (NADS). We estimated total and cancer-specific crude incidence and mortality rates by age group and sex, as well as age-standardized (Segi's world population) incidence (ASIR(W)) and mortality (ASMR(W)) rates. Statistical analyses were conducted using CanReg4 and Stata/IC 10.1. Results: We identified 8,225 new cases of cancer excluding non-melanoma skin cancer (54.3% among women). Of all cases, 6,943 (84.4%) were verified by microscopy and 669 (8.1%) were detected only by death certificate. ASIR(W) for all invasive cancers was 162.8 per 100,000 women and 177.6 per 100,000 men. Breast, cervix, colorectal, stomach and thyroid were the most common types of cancer in women. In men, the corresponding malignancies were prostate, stomach, colorectal, lung and lymphoma. ASMR(W) was 84.5 per 100,000 person-years in women and 106.2 per 100,000 person-years in men. Breast and stomach cancer ranked first as causes of death in those groups, respectively. Conclusion: Overall, mortality rates in our region are higher than national estimates possibly due to limited effectiveness of secondary prevention strategies. Our work emphasizes the importance of maintaining high-quality, nationwide PBCRs.

Background: Postpartum depression (PPD) is a public health problem with high prevalence in Chile. Many factors are associated with PPD. Aim: To analyze the factors associated with the incidence of depressive symptoms (SD) in women with low obstetric risk. Material and Methods: Cross-sectional analytical study on a sample of 105 postpartum women with low obstetric risk assessed by the Edinburgh Depression Scale at the eighth week postpartum. Results: A 37% prevalence of depressive symptoms was found. Univariate analysis showed that the perception of family functioning, overcrowding and number of siblings, were significantly associated with postpartum depressive symptoms. A multiple regression model only accepted family functioning as a predictor of depression. Conclusions: Perception of family functioning was the only variable that explained in part the presence of depressive symptoms in women with low obstetric risk.

O objetivo deste estudo é examinar a literatura e identificar os resultados mais relevantes da alta precoce pós-parto para as mulheres, recém-nascidos e o sistema de saúde. Uma estratégia de busca eletrônica foi projetada, incluindo as seguintes fontes: Web of Science, Scopus, ProQuest e PubMed/MEDLINE utilizando-se os seguintes termos: (precoce e alta hospitalar), ou (duração e permanência) e (pós-parto ou pós-natal) e (efeito de resultado ou * ou resultado). A análise de conteúdo foi utilizada para identificar e sintetizar os resultados e os métodos dos trabalhos de investigação. A evidência disponível não é suficiente para rejeitar ou apoiar a prática da alta precoce no pós-parto porque os estudos apresentaram resultados diferentes para as mulheres e os recém-nascidos. A necessidade de realizar estudos clínicos, de forma sistemática, é discutida.

The objective of this study is to examine the literature and identify most salient outcomes of early postnatal discharge for women, newborns and the health system. An electronic search strategy was designed including the following sources: Web of Science, Scopus, ProQuest and PubMed/MEDLINE, using the following terms: (early AND discharge) OR (length AND stay) AND (postpartum OR postnatal) AND (effect* OR result OR outcome). Content analysis was used to identify and summarise the findings and methods of the research papers. The evidence available is not enough to either reject or support the practice of early postnatal discharge; different studies have reported different outcomes for women and newborns. The need of systematic clinical research is discussed.

Este estudio objetivó examinar la literatura e identificar los resultados más relevantes del alta precoz postparto para las mujeres, recién nacidos y el sistema de salud. Una estrategia de búsqueda electrónica fue proyectada, incluyendo las siguientes fuentes: Web of Science, Scopus, ProQuest y PubMed/MEDLINE utilizando los siguientes términos: (precoz y alta hospitalaria), o (duración y permanencia) y (postparto o post-natal) y (efecto de resultado o resultado). El análisis de contenido fue utilizado para identificar y sintetizar los resultados y los métodos de los trabajos de investigación. La evidencia disponible no es suficiente para rechazar o apoyar la práctica del alta precoz en el postparto porque los estudios presentaron resultados diferentes para las mujeres y los recién nacidos. La necesidad de realizar estudios clínicos, de forma sistemática. es discutida.

The objective of this study is to examine the literature and identify most salient outcomes of early postnatal discharge for women, newborns and the health system. An electronic search strategy was designed including the following sources: Web of Science, Scopus, ProQuest and PubMed/MEDLINE, using the following terms: (early AND discharge) OR (length AND stay) AND (postpartum OR postnatal) AND (effect* OR result OR outcome). Content analysis was used to identify and summarise the findings and methods of the research papers. The evidence available is not enough to either reject or support the practice of early postnatal discharge; different studies have reported different outcomes for women and newborns. The need of systematic clinical research is discussed.

Este estudio objetivó examinar la literatura e identificar los resultados más relevantes del alta precoz postparto para las mujeres, recién nacidos y el sistema de salud. Una estrategia de búsqueda electrónica fue proyectada, incluyendo las siguientes fuentes: Web of Science, Scopus, ProQuest y PubMed/MEDLINE utilizando los siguientes términos: (precoz y alta hospitalaria), o (duración y permanencia) y (postparto o post-natal) y (efecto de resultado o resultado). El análisis de contenido fue utilizado para identificar y sintetizar los resultados y los métodos de los trabajos de investigación. La evidencia disponible no es suficiente para rechazar o apoyar la práctica del alta precoz en el postparto porque los estudios presentaron resultados diferentes para las mujeres y los recién nacidos. La necesidad de realizar estudios clínicos, de forma sistemática. es discutida.

O objetivo deste estudo é examinar a literatura e identificar os resultados mais relevantes da alta precoce pós-parto para as mulheres, recém-nascidos e o sistema de saúde. Uma estratégia de busca eletrônica foi projetada, incluindo as seguintes fontes: Web of Science, Scopus, ProQuest e PubMed/MEDLINE utilizando-se os seguintes termos: (precoce e alta hospitalar), ou (duração e permanência) e (pós-parto ou pós-natal) e (efeito de resultado ou * ou resultado). A análise de conteúdo foi utilizada para identificar e sintetizar os resultados e os métodos dos trabalhos de investigação. A evidência disponível não é suficiente para rejeitar ou apoiar a prática da alta precoce no pós-parto porque os estudos apresentaram resultados diferentes para as mulheres e os recém-nascidos. A necessidade de realizar estudos clínicos, de forma sistemática, é discutida.

Scybalocanthon arcabuquensis Molano y Medina, sp. nov. is described. The species is restricted to the oak forest at Arcabuco municipality, department of Boyacá, Eastern Cordillera of the Colombian Andes. The male genitalia is described and illustrated, the variation of structures of the internal sac is discussed for various species of the genus and some structures from the internal male genitalia are proposed as possible unique characters useful for defining the genus.

Se describe Scybalocanthon arcabuquensis Molano y Medina, sp.nov. La distribución de esta especie se encuentra restringida a los bosques de roble del municipio de Arcabuco, Departamento de Boyacá, sobre la cordillera Oriental de los Andes en Colombia. El órgano genital del macho se describe e ilustra, se discute la variación de las estructuras del saco interno de varias especies del género, y se proponen algunas estructuras del órgano genital como posibles caracteres únicos que definen el género.

Nowadays, the use of digital communication systems has increased in such a way that network bandwidth is affected. This problem can be solved by implementing data compression algorithms in communication devices to reduce the amount of data to be transmitted. However, the design of large hardware data compression models implies to consider an efficient use of the silicon area. This work proposes the conjunction of two different hardware lossless data compression approaches which share common hardware elements. The project also involves the design of a hardware/software architecture to exploit parallelism increasing execution speed while keeping flexibility. A custom coprocessor unit executes the compute-intense tasks of the Burrows-Wheeler Transform and the Lempel-Ziv lossless data compression schemes. This coprocessor unit is controlled by a SPARC V8 compatible general purpose microprocessor called LEON2.

Hoy en día, el uso de sistemas de comunicación digitales ha aumentado de tal forma que el ancho de banda en las redes resulta afectado. Este problema puede solucionarse implementando algoritmos de compresión de datos en dispositivos de comunicación reduciendo la cantidad de datos a transmitir. Sin embargo, el diseño de modelos complejos de compresión de datos en hardware implica considerar el uso eficiente de la superficie de silicio. Este trabajo propone la combinación de dos esquemas diferentes de compresión de datos sin pérdida que compartan elementos comunes. Este proyecto también trata el diseño de una arquitectura hardware/software que explote el paralelismo e incremente la velocidad de ejecución manteniendo su flexibilidad. Un coprocesador ejecuta las tareas computacionalmente intensas de los esquemas de compresión Burrows-Wheeler Transform y Lempel-Ziv. El coprocesador es controlado por un microprocesador de propósito general compatible con la arquitectura SPARC V8 llamado LEON2.

Non-communicating hydrosyringomyelia has been described in association with several types of spinal pathologies, but it has rarely been reported with demyelinative lesions. Therefore, we report a 39-year-old male patient with a history of peripheral facial palsy secondary to a cranial herpes zoster infection in 1996. He subsequently developed chronic pain localized at his neck and left shoulder. An MRI of the cervical spine showed an intramedular lesion with a demyelinative aspect extending from the level of the C4 disk to the C5 disk, and the presence of syringomyelia at the level of the C6 disk. The patient refused to undergo other diagnostic procedures. In 1998, he presented Lhermitte's sign. A reduction of the intramedular lesion and persistence of the hydrosyringomyelia was observed in a new MRI of the spine. An MRI of the brain revealed an isolated right capsular hyperintensive lesion in T2 and FLAIR. Serologies for HIV, the herpes virus, HTLV I-II and VDRL were negative, while evoked potentials were normal. In September of 1998, the patient was asymptomatic, his neurological examination was normal, and there were no changes in a control MRI. Clinical evolution and MRI findings suggest a primary demyelinative etiology of a spinal lesion, but a post-infectious mechanism cannot be ruled out. The pathogenesis of syringomyelia associated with demyelinative lesions remains unknown. One theory holds that the edema associated with plaque produces a mechanical obstruction to the normal cerebrospinal flow, generating the hydromyelia. Others believe that syringomyelia results from ex vacuo spinal atrophy. Although its low rate of incidence and the absence of pathognomonic radiological findings make diagnosis difficult, we believe that demyelinative etiology should be considered whenever an isolated spinal lesion is found in association with syringomyelia, as in these cases surgery would be contraindicated.

La siringomielia no comunicante ha sido descrita en asociación con diversas patologías medulares, pero raramente ha sido reportada en relación con lesiones desmielinizantes. Presentamos un paciente de 39 años, varón, con antecedentes de herpes zoster craneal en 1996 que evolucionó con omalgia izquierda y cervicalgia persistente. La resonancia magnética (RM) de médula cervical evidenció lesión intramedular focal a nivel C4-C5 de aspecto desmielinizante, y la presencia de hidrosiringomielia nivel C6. El paciente rehusó nuevos procedimientos. En 1998 agrega signo de Lhermitte. Una nueva RM espinal mostró reducción de la lesión intramedular cervical con persistencia de la siringomielia no comunicante. La RM cerebral objetivó una única lesión puntiforme en el brazo posterior de la cápsula interna derecha. Las serologías para HIV, herpes, HTLV I-II, VDRL y potenciales evocados fueron normales. En septiembre de 1998 se encontraba asintomático, con examen neurológico normal y sin cambios en el control por imágenes. La evolución clínica y hallazgos neurorradiológicos sugieren una lesión primariamente desmielinizante versus un mecanismo postinfeccioso La patogénesis de la siringomielia no comunicante asociada a lesiones desmielinizantes es discutida: se postula dilatación ependimaria mecánica por obstrucción al flujo del líquido cefalorraquídeo causado por el edema de la placa espinal, versus dilatación ependimaria secundaria a mielomalacia. Pese a su baja prevalencia y a la dificultad diagnóstica que plantea la ausencia de un patrón radiológico característico, la patología desmielinizante debería considerarse entre los diagnósticos diferenciales de lesiones intramedulares asociadas a hidromielia, ya que en estos casos el abordaje quirúrgico no estaría indicado.