Testicular yolk sac tumor
Two year old with a testicular mass
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The right testis is grossly enlarged and replaced with a heterogeneous, hyperechoic mass with multiple cystic areas within it. The mass contains extensive internal vascularity with some low resistant arterial waveforms.
No inguinal or intra-abdominal lymphadenopathy seen.
3 case question available
The appearance of a large mass replacing the testes, with cystic (necrotic) areas, but without any tumoral calcification or fat favors the diagnosis of a yolk sac tumor over a teratoma, which is the main differential in this age group.
The patient's serum AFP was elevated, further supporting this diagnosis.
This was subsequently proven histologically.