[Pseudotumoral hyperplasia of the tunica vaginalis. Apropos of a case in an 18-year-old adolescent].

The tunica vaginalis is not only the site of congenital lesions, but also the site of acquired disorders of inflammatory, reactive or neoplastic origin. In response to various irritative stimuli, the vaginalis serosa reacts in the same way as the pleura, pericardium, or peritoneal lining by undergoing mesothelial cell hyperplasia. A new case of cystic pseudo-neoplastic hyperplasia of tunica vaginal is in an 18-year-old man, 6 years after hydrocele, is reported.