Negative-pressure pulmonary Hemorrhaging Due to Severe Obstructive Sleep Apnea

A 24-year-old man with a history of bloody sputum for 6 months was referred to our hospital suspected alveolar hemorrhaging due vasculitis. Chest computed tomography showed ground-glass opacities in both lungs, and an examination his bronchoalveolar lavage fluid hemorrhaging. However, no evidence vasculitis found, subsequent polysomnographic testing confirmed that he had severe obstructive sleep apnea (OSA). Since the improved after initiation continuous positive airway pressure treatment, diagnosis negative-pressure OSA.