title: Massive embryonal cell carcinoma of testes.
mesh_terms: D006801:Humans; D008297:Male; D008875:Middle Aged; D009929:Organ Size; D013724:Teratoma / Q000473:pathology*; D013736:Testicular Neoplasms / Q000473:pathology*; D013737:Testis / Q000033:anatomy & histology