to test the hypothesis that a high risk for cancer of the colon might be associated with high concentrations of neutral steroids in the colon and with breakdown of these compounds by intestinal bacteria , the faecal neutral steroid concentrations of 84 rural south african black adults ( a population at low risk for colonic cancer ) , and of 98 north american white adults ( a population at high risk for colonic cancer ) were compared .
C0009368
colon
C0007102
colonic cancer