中央气道炎性肌纤维母细胞瘤CT影像表现

CT Imaging of Central Airway Inflammatory Fibroblastoma

目的探讨中央气道炎性肌纤维母细胞瘤(IMT)的CT表现,以提高对本病的认识。方法回顾性分析经手术病理证实的7例中央气道IMT患者的临床、CT影像资料,分析CT影像特点。结果7例IMT中,4例发生于气管,3例发生于主支气管;年龄18~70岁,中位年龄44岁;病变最大径约为7~32 mm,平均(17.4±4.9)mm。CT表现为腔内结节状生长(5例)及不规则腔内外生长(2例);平扫CT值21~60 HU,平均值约为39.8 HU;其中5例行CT增强检查,表现为中度(1例)或明显强化(4例);可伴阻塞性炎症及肺不张(3例)。结论IMT的CT表现有一定特征性,正确认识CT表现有助于提高诊断及鉴别能力。

Objective To investigate the CT manifestations of central airway inflammatory myofibroblastoma(IMT)in order to improve the understanding of this disease.Methods We retrospectively analyzed the clinical and CT imaging data of seven adult cases with surgically pathologically confirmed central airway IMT,and summarized their CT imaging characteristics.Results Among the seven cases of IMT,four of them occurred in the trachea and the other three in the main bronchus.The age of onset of patients ranged from 18 to 70 years,with a median age of 44 years.The maximum diameter of the lesion was about 7-32 mm,with a mean maximum diameter of about(17.4±4.9)mm.The lesions appeared on CT as nodular growths within the lumen(5/7)and irregular simultaneous growths within and outside the lumen(2/7).The plain CT values of the lesions were about 21-60 HU,with a mean CT value of about 39.8 HU.Five of the seven patients underwent CT enhancement and showed moderate(1/5)or significant enhancement(4/5).Also IMT can occur with obstructive inflammation and pulmonary atelectasis(3/7).Conclusion The CT manifestation of IMT has certain characteristics,and a correct understanding of the CT manifestation of this disease can help to improve our diagnosis and differentiation ability.