腹部炎性肌纤维母细胞瘤CT表现

The CT findings of abdominal inflammatory myofibroblastic tumor

目的:探讨腹部炎性肌纤维母细胞瘤(IMT)的CT表现,提高对本病的认识。方法:对经病理证实的15例腹部炎性肌纤维母细胞瘤患者的CT和临床资料进行回顾性分析,其中良性肿瘤14例,恶性肿瘤1例(脾脏)。结果:15例中肿瘤发生在肝脏10例,脾脏3例,右肾和横结肠系膜各1例。CT平扫示14例病灶呈不均匀低或稍低密度,1例为等密度;病灶形态为圆形、类圆形和不规则团块状11例,"花瓣"或"葫芦"形各2例且均发生于肝脏;3例脾IMT中,瘤内出血1例,钙化2例。增强扫描动脉期示13例病灶为轻度强化或不强化,11例病灶在门脉期和延迟期呈片絮状、结节状、环形和分隔状强化,5例出现延迟期病灶缩小或向中心充填。4例肝脏IMT表现为"双环征"或"三环征",灶周水肿5例,肠系膜炎和肾周筋膜增厚各1例,5例肝IMT伴发胆管扩张和结石。结论:认识腹部IMT的CT表现特点,结合临床资料有助于对本病的诊断。

Objective： To investigate the CT findings of abdominal inflammatory myofibroblastic tumor （]MT）. Methods： The CT findings and clinical data of 15 patients with inflammatory myofibroblastic tumor confirmed by pathologi- cal examination in abdomen were reviewed retrospectively. Results： Of all the patients with IMT, there were 10 tumors in liver,3 in spleen, 1 in right kidney and transverse mesocolon respectively. CT findings： 14 lesions showed slightly low or low-density and uneven on CT plain scanning, 1 lesions showed isodensity. 11 lesions showed round, similar round or irregu- larity bolus in shape,2 lesions showed petal-like or calabash respectively in liver. In 3 cases of spleen IMT, 1 with intratu- mor hemorrhage,2 with calcification. 13 cases showed mild enhanced or not enhanced in arterial phase, 11 cases showed flocc,nodosity,ring and septatus enhanced in portal venous phase or in delayed phase,the lesions of 5 cases contracted or filled toward center in delayed phase, 4 cases of liver IMT showed double-ring or three-ring sign, 5 with surrounding edema, 1 with mesenteritis and perirenal fascia thickening respectively. 5 cases of liver IMT with cholangiectasis and calculus. All of the patients, 14 were benign, 1 with malignant in spleen. Conclusion：It is helpful to diagnose IMT by recognizing the CT fea- ture of the disease combined with clinical data.