disease has location testicular pure germ cell tumor testicular yolk sac tumor https://www.malacards.org/card/testicular_yolk_sac_tumor EFO:1000574 testis yolk sac tumour yolk Sac tumour of testis testicular yolk sac tumor endodermal-sinus tumor yolk Sac tumour of the testis A non-seminomatous malignant germ cell tumor arising from the testis. It affects infants, young children, and postpubertal males. It is the most frequently seen testicular neoplasm during childhood. The vast majority of patients present with an asymptomatic scrotal mass. The tumor mimics the yolk sac of the embryo and produces alpha-fetoprotein (AFP). It metastasizes to distant anatomic sites. Prognostic factors relate to the clinical stage and the degree of AFP elevation. testis yolk sac tumor NCIT:C8000 endodermal sinus tumour of the testis testicular endodermal sinus tumour GARD:0023502 MEDGEN:79028 MONDO:0003402 endodermal-sinus tumour DOID:5344 yolk sac tumor ONCOTREE:TYST UMLS:C0279708 endodermal sinus tumour of testis yolk sac tumour testicular yolk Sac neoplasm Orchidoblastoma testicular non-seminomatous germ cell cancer yolk sac tumor testis