Pulmonary histocytosis X: clinical observation of early-stage disease

Histocytosis X is a rare disease of unknown etiology involving the reticuloendothelial system. We present a case of a 32 year-old man diagnosed with Pulmonary Histocytisis X. The CT image of the lungs showed disseminated disease with the formation of cyst-like cavities, which were histologically verified using lung biopsy.