[Gastrointestinal stromal tumors: five case reports and review of the literature].

Being a rare entity, GISTs represents the most common subset of mesenchymal tumours that arise from the digestive tract. Their immunohistochemical and histopathologic features distinguish them from other gastrointestinal mesenchymal neoplasms. These tumours have been the matter of considerable debate in the literature regarding their histogenesis, criteria for diagnosis, prognostic features and treatment.

[Laparoscopic treatment of biliary cysts].

Here comes presented three cases of biliary cysts treated with laparoscopic technique. In the first case the discovery of a single cyst of small size on the hepatic margin have consented the total removal. In the second case was about a voluminous unique cyst, while in the third has been found an hepatic polycystosis.

[Biliary cystadenoma. A report of 2 cases].

Two cases of cystadenoma of the biliary tract are presented. This is a rare tumor that represents less than 5% of non parasitic cysts of biliary origin. It usually occurs in middle-aged women.

[Primary gastric lymphoma. Personal experience].

The authors report their experience regarding primary gastric lymphoma. The series presented consists of 5 cases: a correct preoperative diagnosis of primary gastric lymphoma was made in one case, whereas pseudolymphoma was hypothesised in a second patient. The remaining three cases were all maltomas.

[Antropyloric lithiasic obstruction: a variant of Bouveret's syndrome].

Bouveret's syndrome is a rare complication of a biliodigestive fistula, where a big stone occludes the pyloro-duodenal region. The authors describe a case with obstructive variant at antropyloric level. With the help, of the literature they speak about this matter with particular attention to the clinic symptomatology and diagnostic and therapeutic procedure.