Fig. 1From: The development of large-cell carcinoma in the wall of a giant bulla complicated by hemorrhage a A solitary mass in the right upper lobe of the lung. The mass was well-circumscribed and surrounded by a reticular shadow. The average HU value of the mass on HRCT was 35. b An emphysematous giant bulla of the lung was observed 1 year before the hemorrhagic presentation of the tumorBack to article page