<prompt> Germ cell tumors of paediatric includes all exceptPure yolk sac tumorLeydig cell tumorChoriocarcinomaEmbryonal cell carcinoma  <response>: Germ cell tumors Germ cell tumors, as the name suggests, arise from Primordial germ cells Precursor germ cells or gametocytes,Germ cells develops early in life. In growing fetus, germ cells migrate from their point of origin to the gondal area.Germ cells that still have to reach the gonads are called primordial germ cells.After reaching to gonads these become mature germ cells and the end products of germ cell cycle are the egg or sperm.Germ cell tumors arise from primordial germ cells.Therefore germ cells tumor may be : -Gonadal In testis or ovaryExtragonadal : - When primordial genn cells fail to reach the right location and divide at the site of arrest. Extra-gonadal germ cell tumors may occur at nzediastinum most common site, retroperitonium 2nd most common site, brain, pineal gland, sacrococcygeal region.Germ cell tumor are : -Senzinomadysgerminoma Embryonal carcinoma Yolksac endodermal sinus tumorChoriocarcinoma Teratoma Non-germ cell gonadal tumors These tumors occur in adults. These may occur very rarely in children and occur predominantly in ovary. Tumors arei Surface epithelial tumors : - Serous tumor, mucinous tumor, Brenner tumor etc. Sex cord stromal tumors : - Granulosa-theca cell tumor, Sertoli-Leydig cell tumor 