Human trophoblast cell-surface antigen (TROP2), also known as TACSTD2/GA733-1, M1S1 or EGP-1, encoded by the TROP2 (also known as TACSTD2) gene on 1p32 chromosome, is a transmembrane glycoprotein rarely expressed in healthy tissues, and its role, although not yet clear, is believed to be linked with tumour development and tumour growth regulation [12]. Here, TACSTD2 is linked to neoplasm.