title: Ultrasonic localization of a non-palpable testis tumor.
abstract: A young man was found to have a retroperitoneal seminoma and normal testicles by palpation. Initial diagnosis was an extratesticular primary germ cell tumor until ultrasound examination detected a lesion in the left testicle. A left radical orchiectomy was done and a seminoma of the testicle was found. We recommend ultrasound examination of the testicles to demonstrate occult testicular tumors when faced with the possibility of an extratesticular primary germ cell tumor.
mesh_terms: D000328:Adult; D004407:Dysgerminoma / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D008297:Male; D010173:Palpation; D013736:Testicular Neoplasms / Q000175:diagnosis* / Q000473:pathology; D014463:Ultrasonography