[Aneurysm of the ductus arteriosus. Apropos of case operated on with success].

A 6 week old baby was operated on successfully for removal of an aneurysm of the ductus arteriosus. The aneurysm, absent at the age of 12 days, developed progressively during the closure of the ductus. The only suggestive symptom was a haemoptysis. The radiological appearances were characteristic. The authors discuss the physiopathology, clinical presentation and radiological appearances of this lesion.