Segmentación por tópicos en documentos de múltiples párrafos / Segmentation by topics in multiparagraph documents

Detectar automáticamente los límites físicos adecuados de los subtópicos en un documento es una tarea difícil y muy útil en el procesamiento de texto. Existen algunos métodos que intentan resolver este problema, varios de ellos con resultados favorables, aunque presentan algunas deficiencias; además, muchas de estas soluciones dependen del dominio de la aplicación. Se realiza un análisis de dos algoritmos para la segmentación de documentos y se comparan los resultados obtenidos con cada uno de ellos.

To automatically detect the adequate physical limits of subtopics in a document is a difficult but highly useful task in text processing. There is a few methods attempting to solve this problem, several of which have favorable results, although presenting some difficulties; also, many of these solutions depend on application skills. An analysis was made of two document segmentation algorithms and the results from each of them were compared.

[Isolated neurofibroma of the common bile duct]. / Neurofibroma intraparietal aislado del colédoco.

The neurogenic tumors in the biliary tract are rare and usually are amputation neuroma that occur after cholecystectomy. We describe a case of isolated neurofibroma of the common bile duct in a young man not cholecystectomized. The patient suffered recurrent episodes of abdominal pain, vomiting and weight loss without clinical signs of Von Recklinghausen's disease or jaundice. The hepatogram was normal. The echography indicated a solid formation with obstruction of the proximal common bile duct. In the ERCP the stenosis was found. Surgical excision of the tumor and anastomosis of bilateral hepatic ducts and jejunum were carried out. At microscopic examination intraparietal neurofibroma of the common bile duct was found. As isolated entity, we know of only one reported case.

Neurofibroma intraparietal aislado del colédoco. / [Isolated neurofibroma of the common bile duct]

The neurogenic tumors in the biliary tract are rare and usually are amputation neuroma that occur after cholecystectomy. We describe a case of isolated neurofibroma of the common bile duct in a young man not cholecystectomized. The patient suffered recurrent episodes of abdominal pain, vomiting and weight loss without clinical signs of Von Recklinghausens disease or jaundice. The hepatogram was normal. The echography indicated a solid formation with obstruction of the proximal common bile duct. In the ERCP the stenosis was found. Surgical excision of the tumor and anastomosis of bilateral hepatic ducts and jejunum were carried out. At microscopic examination intraparietal neurofibroma of the common bile duct was found. As isolated entity, we know of only one reported case.