CT findings in pulmonary sclerosing hemangioma（PSH） and its pathology

Objective To analyze the CT findings in pulmonary sclerosing hemangioma（PSH）for improving its imaging diagnosis. Methods CT data and pathological reports of 42 patients admitted to our hospital in September 2004-June 2009 were retrospectively analyzed. Results The median age of the 42 patients（38 females and 4 or median males）included in this study was 46.6 years（range from 19 to 66 years）.Of the lesions in the lung,39（92.86%）were located in the medial or median zone.Nodular foci were found in 30 cases（71.43%）and tumor mass 12 cases.Smooth tumor margin was shown in 31 cases,lobulated tumor margin in 9,and speculated change in 2 cases.Calcification was observed in 11 cases with a prevalence of up to 66.67%when the diameter of lesion was 30mm larger.Of the 31 enhanced cases,8（25.81%）and 18（66.67%）showed a heterogeneous density of lesion before and after contrast administration.The mean enhancement value was（31.16±11.93）HU（range 1-64 HU）.The seemingly characteristic peritumor ground-glass opacity and air-crescent sign were found in 11 and 6 cases,respectively. Conclusion PSH usually occurs in the medial or median lung zone of middle-aged and old females,which is characterized by obvious or heterogeneous enhancement,peritumor ground-glass opacity,and air-crescent sign.