气管主支气管原发平滑肌瘤的MSCT表现

MSCT Features of Central Airway Primary Leiomyoma

目的:分析气管主支气管原发平滑肌瘤的MSCT表现,以提高对其认识。方法:回顾性分析经病理证实的7例气管主支气管原发平滑肌瘤患者临床特征、CT表现及病理表现。结果:7例患者女性6例,男性1例,年龄19~65岁,均以非特异性呼吸道症状就诊。肿瘤位于气管主干2例,隆突1例,右主支气管1例,左主支气管3例。肿瘤大小0.6~2.0 cm。MSCT表现呈类圆形、椭圆形者6例,呈分叶形者1例。腔内生长型者6例,腔内外生长型者1例。7例CT平扫描密度均匀,未见钙化,增强扫描呈中等到明显强化者6例,轻度强化者1例。7例均未见明确坏死、囊变。7例均无纵隔淋巴结肿大及胸腔积液。伴阻塞性改变者2例。结论:气管主支气管原发平滑肌瘤的CT表现有一定的特征性,多表现为腔内生长的规则病灶、多强化明显。CT及后处理技术对显示肿瘤大小、范围及与邻近结构的关系有一定的价值。

Objective： To discuss the MSCT features of central airway primary leiomyoma and improve the diagnostic ability of this disease. Methods： The MSCT findings, clinical characteristics and pathological findings of 7 patients with pathologically confirmed central airway leiomyoma were retrospectively analyzed. Results： 1 male and 6 females with age of 19 - 65 years old were included, all with nonspecific respiratory symptoms. There were 2 cases located in trachea, 1 case in carina, 3 cases in left main bronchus and 1 case in right main bronchus, with maximum diameter of 0.6 - 2 cm. MSCT showed the shape of tumors were round or oval in 6 cases and lobular in one case. 6 cases were entophytic growth type and 1 case was both entophytic and helophytic growth type. 7 cases of patients CT scan without contrast showed homogeneous density with no calcification or fat. Enhanced CT scan showed 6 cases with moderate to marked enhancement and 1 case with mild enhancement. No necrosis or cystic degeneration were observed in 7 cases, no meditational adenopathy or pleural effusion either. There were 2 cases with obstructive change. Conclusion： There are some features of central airway leiomyoma on MZCT such as regular tumor in the lumen, often demonstrate marked enhancement. CT and post processing techniques have a certain value in showing size, range and the relationship with adjacent structures of the tumor.