[Internal derivation in the treatment of hepatic hydatidosis]. / Derivación interna en el tratamiento de las hidatidosis hepáticas.

The results of the surgical treatment of human hydatic cyst by cystojejunostomy are presented. This technique was performed in 17,3% of all cysts treated by the authors. The conditions for using technique, as well as it morbidity and mortality are reviewed. The authors' conclusion is that cystojejunostomy is a valid surgical technique for hydatic cyst in some cases in which it is indicated.

[Duodenal reticulosarcoma (an unusual case of primary duodenal tumor)]. / Reticulosarcoma duodenal (un raro caso de tumor primitivo duodenal).

A rare case of primitiv mesenchimatous neoplasm of the duodenum is presented. After a review of the few cases reported in the literature, the authors emphasize the unspecificity of the clinical features and the diagnostic reliability of the fibroendoscopy. Alterations of the cellular immunity were presented in this case. The restricted posibilities of treatment in these highly malignant tumors are also discussed.