硬化性肺泡细胞瘤的CT表现与病理对照研究

目的：分析硬化性肺泡细胞瘤(PSP)的 CT 和病理表现,提高对此病的认识。方法回顾性分析经手术病理证实的12例 PSP(13个病灶)的临床及 CT 资料,12例均行 CT 平扫,9例行增强扫描。结果11例为单发孤立病灶,1例呈多发病灶,病灶最大长径1.10~8.03 cm,平均(3.53±0.78)cm。13个病灶中,左肺3个(23.1%,上叶1个,下叶2个),右肺10个(76.9%,上叶2个,中叶2个,下叶6个)；双下肺8个(61.5%),中上肺5个(38.5%)；肺门中心型4个(30.8%),周围型9个(69.2%)；病灶形状呈卵圆形及类圆形8个(61.5%),不规则形1个(7.7%),浅分叶4个(30.8%)；边缘光滑10个(76.9%),边缘毛刺3个(23.1%)；增强后7个见血管贴边征(53.8%),空气新月征6个(46.2%),晕征6个(46.2%),尾征6个(46.2%)；3个(23.1%)病灶内有散在点样或斑点样钙化,余病变 CT 平扫密度均匀,CT 值28~47 HU,平均35 HU；9例(10个病灶)增强扫描后,2个轻度强化,5个明显均匀强化,3个不均匀强化。增强后 CT 值60~110 HU,平均77.2 HU,最大强化净值为75 HU。结论青中年女性3 cm 左右单发圆形或卵圆形软组织密度样肺结节或肿块,边缘光滑,增强后明显均匀性强化,同时伴有血管贴边征、空气新月征及晕征、尾征时,要考虑到 PSP 的诊断。

The comparison of CT features and pathologic changes of pulmonary sclerosing pneumocytoma

Objective To analyze CT morphologic features and pathologic changes of pulmonary sclerosing pneumocytoma (PSP) and to improve preoperative diagnostic accuracy of PSP.Methods The clinical and CT data of 12 cases with PSP (with total 13 lesions)confirmed by surgery and pathology were collected and analyzed retrospectively.All cases performed CT plain scan,9 cases had contrast CT scan.Results 1 1 cases had isolated lesions,and 1 case multiple lesions.The long-axis diameter ranged from 1.10 cm to 8.03 cm, with an average of (3.53±0.78)cm.Of 13 lesions,3 located in left lung (23.1%,1 in the upper lobes,2 in lower lobe),and 10 in right lung (76.9%,2 in upper lobe,2 in the middle lobe and 6 in lower lobe);8 lesions located in the lower lobe (61.5%),and 5 in upper and middle lobe (38.5%).There were center type of 4 lesions (30.8%),and peripheral type of 9 lesions (69.2%);The shapes of 8 lesions wereovoid or similar round (61.5%),irregular type of 1 case (7.7%),shallow lobe of 4 cases (30.8%);Smooth edge of 10 cases (76.9%), burr edge in 3 cases (23.1%).With contrast CT scan,7 cases (53.8%)had vascular welt sign,6 cases (46.2%)had air crescent sign,6 cases (46.2%)had halo sign,and 6 cases (46.2%)had tail sign.3 lesions (23.1%)had scattered spot calcification,and the other lesions had uniform density.The CT value ranged from 28 HU to 47 HU,with the average of 35 HU;Of 9 cases (with 10 lesions)with contrast CT scan,2 lesions had mild enhancement,5 cases had obvious enhancement,and 3 case had non-uniform enhancement.Enhanced CT value was 60-1 10 HU,with the average of 77.2 HU,and with the maximum of 75 HU.Conclusion If the pulmonary nodules or masses in middle-aged females had single round or ovoid shape,with about 3 cm diameters,soft-tissue density,smooth edge,and with obvious enhancement after contrast CT scan,and accompanied by vascular welt sign,air crescent sign,halo sign,or tail sign, the diagnosis of PSP should be considered.