To determine the tissue specific expression patterns of FNDC5 variant genes, we performed auantitative real-time PCR of 16 human tissues and 11 human normal or cancer cell lines such as HAEC (human aortic endothelial cell), A549 (adenocarcinomic human alveolar basal epithelial cells), KMS26 (plasma cell myeloma cell), HeLa (cervical adenocarcinoma cell line), MIHA (nontumorigenic immortalized human hepatocyte cell line) HepG2, Hep3B, Sk-Hep1, SNU449, and Huh7(human hepatoma cell lines) and AC16 (human cardiomyocyte cell line). The gene discussed is FNDC5; the disease is cancer.