Additional isoforms (cTAGE-1B, cTAGE-1C and cTAGE-2s) exist. Testis. Expressed in several cutaneous T-cell lymphoma (CTCL) cell lines, in head-neck carcinomas and carcinoma of ovarian tissues. Cancer-testis antigen containing the epitope FVLFLFGGN which is detected in sera of CTCL patients according to PubMed:12839582. Tumor-associated antigen found in several cutaneous T-cell lymphoma (CTCL), and in particular in mycosis fungoides patients and in Sezary syndrome patients. Detected by 5 of 15 sera of Mycosis fungoides patients and by 2 of 3 sera of Sezary syndrome patients, but not by any control sera. Expressed in around 35% of the tested CTCL tumors.