“…When the clinical problem arises in patients with unspecified digestive-tract cancer (small numbers of bil iary, pancreatic, duodenal or esophageal cancer added), 4 samples make up 733 pa tients with 151 liver métastasés; incidence is 21%, range 16-23% [1,11,14,15]. Adding benign abdominal tumors, 2 samples consti tute !…”