Pulmonary Langerhans Cell Histiocytosis X

The term eosinophilic granuloma was first used in 1940 by Lichtenstein and Jaffe and Otani and Erlich for patients with osteolytic lesions in the bone and intense eosinophilic infiltration in the tissues. Nowadays Eosinophilic Granuloma or Pulmonary Langerhans Cell Histiocytosis (PLHH) term is used for the disease that is limited in lungs. The fact that more than 90% of the patients are smokers is thought to have an important role of smoking in the pathogenesis. 25% of patients have no symptoms. We presented this case because of a rare disease.