[A case of primary pulmonary histiocytosis X]. / Su di un caso di istiocitosi x polmonare primaria.

The pulmonary primary localization of the histiocytosis X is rather rare. We describe here a case of histiocytosis X with a localization exclusively at pulmonary level in a 38 years old young man who is a heavy smoker. A dry cough, asthenia and an increasing dyspnoea were the first symptoms of the disease. The radiological picture showed a widespread pulmonary intersticepathy. The diagnosis has been obtained testing some fragments of the pulmonary parenchyma taken through a diagnostic thoracotomy with an electron microscope.