The chest radiographs of 33 adult hemophiliacs were reviewed for possible pulmonary features of this disease. Only 7 patients showed no abnormalities; 12 patients exhibited scarring, fibrosis, and pleural thickening of the lung, interpreted as the sequelae of intrapulmonary hemorrhage or hemothorax. The remaining 14 patients demonstrated abnormalities of the pulmonary vessels, and 4 of them had evidence of hyperinflation. Possible etiologic factors are discussed.