[2 rare pancreatic tumors as incidental findings. A case report].

We report two cases of rare tumours of the pancreas: one case of a cystadenoma and one case of a PP-oma with no hormonal activity. Both cases were discovered accidentally while screening examination of other reasons. Guided by these cases we draw the following conclusions: 1. Ultrasound is the outstanding screening in diagnosis of rare pancreas tumours. 2. Surgery is the treatment of choice. 3. Final diagnosis can only be made by histology. 4. Immunohistochemistry is the best method in differentiation of endocrine tumours.