Abstract
Yolk sac tumor is a non-seminomatous testicular germ cell tumor rarely found in adults. It is an extra-embryonic differentiated tumor. It reproduces structures evocative of the yolk sac in humans. We report the clinical case of a 37-year-old patient, with no previous history, who is followed up for a tumor of the left testicle revealed by an increase in size and induration of the testicle. The left orchiectomy, performed through an inguinal approach, allowed us to retain the diagnosis of pure yolk sac tumor on anatomical and immunohistochemical examination. The evolution was marked during the surveillance by a relapse requiring a systemic treatment.
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