Background : Post-pubertal testicular teratomas can infrequently undergo somatic-type malignant transformation. Rarely, the transformed component is an embryonic type neuroectodermal tumour (ENET). Morphology and immunophenotype overlap with Ewing sarcoma, and legacy terminology adds confusion. The distinction matters because treatment pathways diverge. We present this case to illustrate practical pitfalls in diagnosing testicular tumours and how thorough sampling of orchidectomies with molecular techniques can secure the correct diagnosis of rarely documented entities.
Liu et al. (Sun,) studied this question.