“…The canine transmissible venereal tumor (CTVT) is also known as sticker 's sarcoma, transvenereal sarcoma, infectious sarcoma, canine condyloma, transmissible lymphosarcoma, venereal granuloma, and contagious venereal tumor (Das & Das, 2000;Nemzek et al, 2015;Thamm, 2007). Despite immense mutation, CTVT adapted, survived, and spread across multiple continents, making it the oldest known continuously passaged somatic cell line (Nemzek et al, 2015). CTVTs are distributed globally, predominantly in tropical and subtropical regions.…”