硬化性肺细胞瘤的CT、PET/CT表现与误诊分析

CT and PET/CT diagnosis of pulmonary sclerosing pneumocytoma and analysis of misdiagnosis

目的提高对硬化性肺细胞瘤CT、PET/CT表现的认识,减少误诊。方法回顾性分析15例硬化性肺细胞瘤患者的影像及病理资料,影像资料包括CT、PET/CT表现和术前影像诊断结果,病理资料包括组织形态结构、细胞学形态及免疫组化结果。结果 15例患者共有16处病变,14例单发,1例多发,均为圆形、类圆形软组织结节或肿块,增强扫描病灶大多呈中度至明显强化,PET可见放射性浓聚;7例术前误诊;病理上病变由血管瘤样区、乳头区、实变区和硬化区以不同比例构成,单个瘤体包含至少2种或2种以上组织结构。结论硬化性肺细胞瘤易误诊,了解其CT、PET/CT表现及病理特征有助于提高对该疾病的认识与诊断符合率。

Objective To investigate the CT and PET/CT features of pulmonary sclerosing pneumocytoma （PSP） and ana- lyzed the misdiagnosed cases, in order to improve the capability of accurate diagnosis. Methods The CT, PET/CT and patholog- ical features in 15 cases of PSP were analyzed retrospectively. Results 15 of patients with a total of 16 tumors, in which 14 cases were solitary, 1 case was muhiple. Under unenhanced CT, tumors presented as round or oval shaped nodule or mass with soft tis- sue density. After contrast administration, most of the tumors showed moderate-marked inhomogeneous enhancement. Seven cases were preoperatively misdiagnosed. PSP was composed of four histologic components-namely, solid, papilary, sclerotic and heman- giomatous. A neoplasm had at least two of them. Conclusion It is favourable to recognizing PSP that investigated its CT, PET/ CT and clinicopathologic characters.