[Cancer and advanced pancreatitis of the head of pancreas in the ERCP (endoscopic retrograde cholangio-pancreaticography) (author's transl)].

3 cases each of carcinoma and chronic pancreatitis of the head of pancreas show tha difficulties of differential diagnosis in retrograde cholangio-pancreaticography. When both duct-systems are shown, diagnosis is facilitated when changes are typical. In favor of cancer--apart from well-known criteria--is the more frequent occurrence in the choledochus and, possibly, the higher age of the patients. All other possible techniques have to be utilized side by side with ERCP.