[Intraductal intraepithelial neoplasia and ductal pancreatic carcinoma].

The review of modern achievements in morphology and genetic characteristics of pancreatic tumors with ductal phenotype is presented. Problems of intraductal pancreatic neoplasia (PanIN) as precancerous process for ductal adenocarcinoma are considered in detail.

[Classification of pancreatic exocrine tumours].

Current international histologic classification of exocrine pancreatic tumours is presented. Macro- and microscopic characteristics of benign and malignant tumors are described. The role of immunohistochemistry in differential diagnosis is shown.

[Sygmoid endometriosis].

A case of sygmoid endometriosis is described in a 40-year-old female. After clinical and endoscopic examination, the patient was operated for sigmoid tumor, acute obturation colon obstruction. Histologically diagnosis of intestinal wall endometriosis was established.