A number of patients with chronic pancreatitis develop an inflammatory enlargement of the head of the pancreas leading to complications such as common bile duct, duodenal, pancreatic duct, and/or vascular obstruction. The duodenum preserving pancreatic head resection has been developed to treat these lesions and to avoid a Whipple procedure in chronic pancreatitis. Between 1972 and 1992 280 patients (231 male, 49 female, mean age 44, range 22-76 years) underwent a duodenum preserving pancreatic head resection for chronic pancreatitis. The indication to operate was a cholestases syndrome in 50% of the patients, a duodenal compression in 36% and an obstruction of the portal vein in 16% of the patients. 94% suffered from pain, 53% had recurrent severe pain attacks and 72% had daily pain. Hospital mortality was 1.1% (3/280). Pancreatic fistula, leakage of pancreatic anastomosis and postoperative bleeding occurred in 4.6%, 1.8% and 3.2% of the patients, respectively. A relaparotomy needed 16 patients (5.7%). With respect to glucose tolerance in the early postoperative period 88% of the patients, showed no change in comparison with the preoperative glucose tolerance analysis. In a long-term follow-up (mean follow-up time was 3.7 years (3 months to 18 years)) 219 patients were included. The late mortality within the follow-up period was 5.0% (11/219). 90% of the patients had no or rare pain in the long-term follow-up. 63% of the patients were full rehabilitated professionally. The duodenum preserving pancreatic head resection represents a new standard procedure which solves most surgical problems in chronic pancreatitis. It does not lead to diabetes mellitus.(ABSTRACT TRUNCATED AT 250 WORDS)