[Signet ring cell carcinoma of the Vater's ampulla]. / Carcinoma de células en anillo de sello de ampolla de Vater.

We report an unusual type of carcinoma of the ampulla of Vater composed of signet-ring cells with few neuroendocrine cells and without other variants of carcinoma. The tumor presented with obstructive jaundice and invaded diffusely the ampulla and adjacent duodenal wall. The patient is alive and disease free 24 months after Whipple's resection.

[Agenesis of the gallbladder. Statistic review of the Spanish literature and presentation of a new case]. / Agenesia de la vesícula biliar. Revisión estadística de la literatura española y aportación de una nueva observación.

Agenesis of the gallbladder and of the cystic duct is a rare anomaly of the biliary tree that courses symptomatically in one of three cases. This symptomatology can be explained in some of them only by a dyskinetic alteration of the Oddi sphincter, which would lead to long term choledochal distension with the corresponding biliary stasis and facilitate infection of the pooled bile juice, aside from possible alterations in bile composition and the choledochal mucosa. If this were the case, it could explain the mechanism of production of postcholecystectomy syndrome and residual choledochal lithiasis many years after cholecystectomy with normal peroperative cholangiography. A statistical study is made of the Spanish literature.