the tumor occurred , in order of incidence , in small intestine ( 42 % ) , ileocecal region ( 30 % ) , colon ( 13 % ) , cecum ( 8 % ) , rectum ( 3 % ) , duodenum ( 2 % ) and anorectum ( 1 % ) .
C0021852
small intestine
C0013303
duodenum