the sites of the primary tumours were the stomach in 12 ( 11 % ) , the duodenum in 3 ( 3 % ) , the small bowel in 48 ( 45 % ) , the appendix in 28 ( 26 % ) , the colon in 6 ( 6 % ) , and the rectum in 6 cases ( 6 % ) .
C0013303
duodenum
C0021852
small