FABP4 and neoplasm: In contrast to FABP4, which was primarily expressed in tumors adjacent to adipose tissue (Fig. 2K), FABP5 expression in tumor cells (66 out of 96 cases) was either ubiquitously (68.2%, 45 out of 66 cases) (Fig. 3E) or clustered (31.8%, 21 out of 66 cases) in sporadically distributed groups of cells throughout the tumor (Fig. 3H).