[Agenesis of the diaphragm in a young adult. Apropos of a case]

We report a case of asymptomatic right diaphragm agenesis, in a 20-year-old adult hospitalized for internal bleeding. This kind of malformation is rare, particularly in adults thus it must be recognized. Imaging modalities are the main tool for diagnosis. It may be suggested by chest X-Ray US, baryum opacification and CT allow to establish a definite diagnosis depicting the herniated organs. The treatment is surgical and the prognosis is in general good.