摘要Pulmonary sclerosing hemangioma (PSH),a thoracic tumor,was first described by Liebow and Hubbell[1] in 1956.Recently,immunohistochemical evidence and characterization of antibodies have clarified that PSHs are true tumors.They are mainly composed of epithelial cells (Type Ⅱ pneumocytes) aligned in different directions and accompanied by proliferation and reaction of other components.Because these tumors,especially when multiple,are rare,there is little published information about their clinical manifestations and imaging data.Thus,they can easily be misdiagnosed as malignant disease of the lungs.The presence of a solitary,well-defined,round or oval mass on computed tomography (CT) scanning suggests,however,that pathological examination is necessary to make a definite diagnosis.