[Thymic hyperplasia. Description of a clinical case]

Thymomegaly, which was in the past considered as predisposition to sudden death infants, is judged today as paraphysiological. The study achieved on a 10 months' patient shows the complexity in determining the diagnosis of simple thymic hyperplasia, when together with a massive thymus enlargement are conditions which divert to other pathologies, as in this tested clinical case.