<prompt> All of the following are germ cell tumours except?Mesonephroid tumorsTeratomaEndodermal sinus tumourDysgerminoma  <response>: Germ cell tumours include Teratoma, Dysgerminoma, Endodermal sinus tumour, Embryonal carcinoma, Polyembryoma, Choriocarcinoma and mixed forms. Mesonephroid tumour is an epithelial tumour. It is also known as clear cell carcinoma. It is an uncommon tumour of ovary. It is highly malignant. Ref: Shaws Textbook of Gynaecology, 18th edition, p373-376 