Test Details: Immunohistochemical testing is carried out on biopsy/resected tissue specimen. This testing helps to identify specific antigens (proteins) within tissue sections utilizing an antigen-specific antibody .Human chorionic gonadotropin is a hormone produced by syncytiotrophoblasts composed of α- and β-chains. The β-chain reveals a unique structure and is more specific for syncytiotrophoblasts and related tumours. The α-chain shares amino acid sequences with other hormones such as LH, FSH, and TSH of the pituitary gland. It is expressed in syncytiotrophoblasts in germ cell tumours (choriocarcinoma), non-seminomatous testicular tumours.