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 .Inhibin is a heterodimeric protein (with alpha and beta subunits) that inhibits or activates pituitary FSH secretion. Sex-cord stromal tumours, including Sertoli cell tumours, Leydig cell tumours , adrenocortical tumours, placental and gestational trophoblastic lesions, granular cell tumours of gallbladder and extrahepatic bile ducts.