[Torsion of an undescended testis. Apropos of a case].

The authors report an uncommon case of torsion of an inguinal undescended testis occurring in a 15-year-old child. He consulted seven days later for isolated left inguinal pain. Physical examination showed a left inguinal mass, and only the right testis was palpable within the scrotum. Sonography revealed left inguinal mass with echogenic and heterogeneous contents in keeping with undescended testis. The diagnoses of testis tumor or testis torsion were suggested. Surgical exploration revealed a mass suggesting a testis tumor. Orchidectomy was performed. Histological examination showed that the mass corresponded to a necrotic ischemic testis without tumor cells. In the light of this case, the authors analyse the diagnostic aspects and management of torsion of an undescended testis.