支气管粘液表皮样癌的临床特征及CT诊断

目的 探讨支气管粘液表皮样癌(mucoepidermoid carcinoma,MEC)临床特征及CT影像特点,以提高对本病的认识能力.方法 经手术和病理证实的支气管粘液表皮样癌6例,回顾分析其临床特征和CT影像特点.结果 6例均为低度恶性型,其中病灶位于主支气管2例,为边界清楚的腔内外椭圆形结节,叶支气管3例,为边缘不规则的腔内外生长的类圆形肿块,段支气管1例,为边缘光整的腔内外生长的类圆形肿块.2例瘤内有钙化,3例不均匀轻度强化,2例纵隔及肺门有肿大淋巴结,病理证实为癌转移.6例均有不同程度气道阻塞性改变.结论 低度恶性型支气管MEC在CT上表现为边缘光整或不规则的支气管腔内或腔内外结节或肿块,可有钙化,轻度不均匀强化.

Clinical characters and diagnosis of CT imaging for bronchial mucoepidermoid carcinoma

Objective To study the findings of clinical characters and computed tomography(CT) for mucoepidermoid carcinoma(MEC) in the bronchial tree and improve the recognition.Methods The clinical characters and CT findings of 6 cases of MEC in the bronchial tree pathologically proved were analyzed and correlated with operative and pathologic reports.Results The 6 patients were proved to be low-grade MEC hisopathologically.The tumors were located at the main bronchus(n=2,showed intra-and-extraluminal well-defined oval nodule),lobular bronchus(n=3,showed intra-and-extraluminal well-defined round-shaped mass with irregular margin),segmental bronchus(n=1,showed intra-and-extraluminal well-defined round-shaped mass with a smooth margin).The calcification within lesion was seen in 2 patients.The tumor had slightly heterogeneous enhancement in 3 patients.Enlarged lymph nodes found in the mediastinum and hili areas which were proved metastasis with pathology.Differential bronchial obstructive changes were found in all 6 patients.Conclusion Low-grade MEC of the bronchial tree is showed airway nodule or mass with smooth or irregular margin,heterogeneous enhancement and calcification on CT.