[Tumor of the vitelline sac of the testicle (yolk sac carcinoma)]. / Tumor del saco vitelino de testiculo (yolk sac carcinoma).

The tumour of the yolk sac is a germinal cell neoplasia arising in the prepubertal testicles which was included in the WHO's histological classification of neoplasia of the testicles in 1977. We contribute a case of this histological variety in Stage I, according to the Royal Marsden criteria. The patient was treated with inguinal orchidectomy only and 3 years later remains disease-free.