one hundred fifty patients with right-side colon cancer ( i.e. , patients with adenocarcinoma of the cecum or ascending colon ) were compared to 150 matched left-side colon cancer controls ( i.e. , patients with adenocarcinoma of the descending or sigmoid colon ) and to 123 neighborhood controls , pittsburgh , pennsylvania , standard metropolitan statistical area , 1975-1978 .
C0009368
colon
C0227391
sigmoid colon