testicular yolk sac tumor
Findings
No curated finding names testicular yolk sac tumor yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
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.
Definition from the Mondo Disease Ontology (MONDO:0003402), read 2026-09-29. CC BY 4.0.
Where it sits
- Narrower terms (10)
- enteric pattern testicular yolk sac tumor
- polyvesicular vitelline pattern testicular yolk sac tumor
- reticular pattern testicular yolk sac tumor
- testicular yolk sac tumor, endodermal sinus pattern
- testicular yolk sac tumor, glandular-alveolar pattern
- testicular yolk sac tumor, hepatoid pattern
- testicular yolk sac tumor, macrocystic pattern
- testicular yolk sac tumor, myxomatous pattern
- testicular yolk sac tumor, papillary pattern
- testicular yolk sac tumor, solid pattern
Other names
3 names
Resolves to: testicular yolk sac tumor
- Also called
- testicular yolk Sac neoplasmtestis yolk sac tumortestis yolk sac tumour