The findings demonstrate that FABP1 expression occurs at highest frequency (65–80%) in hepatocellular carcinomas and colorectal adenocarcinomas, at lower frequency (35%) in mucinous carcinoma of the ovary and in other adenocarcinomas of the digestive tract (10–25%), and only rarely (< 5%) in a limited number of other tumor types. This evidence concerns the gene FABP1 and ovarian mucinous adenocarcinoma.