Table 1.

Indications for operation in patients undergoing a pancreaticoduodenectomy

Diagnosis	Frequency	Per cent
Malignant
Pancreatic ductal adenocarcinoma	241	42.7
Ampullary adenocarcinoma	51	9.04
Duodenal adenocarcinoma	29	5.14
Periampullary adenocarcinoma	24	4.26
Cholangiocarcinoma	24	4.26
Neuroendocrine tumour (malignant)	23	4.08
Other (malignant)	29	5.14
Benign
Intraductal papillary mucinous neoplasm	66	11.7
Chronic pancreatitis	31	5.5
Neuroendocrine tumour (benign)	13	2.3
Cystadenoma	9	1.59
Other (benign)	24	4.26