Between 1970 and 1990, 162 patients with carcinoma of the pancreas or the periampullary region were operated upon. A prospective study was conducted in 85 of them who underwent surgery after 1983. The tumour was resected in 63 patients (ductal adenocarcinoma in 43, periampullary carcinoma in 20). Biliary and/or gastrointestinal bypass was performed in 76 patients, and exploratory laparotomy in 23. The operative mortality rate was 3 percent (2/63) among patients with resection and 24 percent (24/99) among those with laparotomy with or without bypass. The longest survival (median: 33 months) was obtained in patients with periampullary tumours; it was 12 months after resection in patients with ductal adenocarcinoma and 4 months in the other cases. The preoperative estimate of unresectability was erroneous in 36.5 percent of the cases. Periampullary tumours were diagnosed only after pathological examination of the lesion removed in 47 percent. These results are in favour of radical surgery, especially since the operative mortality of resection is low and since resection, even palliative, gives a better survival rate than mere bypass.