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目的探讨腹部炎性肌纤维母细胞瘤(inflammatory myofibroblastic tumor,IMT)的CT、MRI表现,旨在提高对其诊断水平。资料与方法回顾性分析经手术病理证实的6例腹部IMT患者的临床及影像学资料。其中男、女各3例,年龄1～61岁,平均35.5岁。5例行CT扫描,其中4例行平扫及增强扫描,1例仅行平扫;1例行MRI平扫及增强扫描。结果肠系膜4例,横结肠1例,前列腺后方1例。5例为单发病灶,1例为多发病灶,部分相互融合。4例边界清晰,2例不清晰。病灶最大横径5.3～15.4cm。CT平扫4例密度均匀,1例密度不均匀,CT值25～58HU;增强扫描3例呈明显强化,其中不均匀强化2例,均匀强化1例,1例呈轻度均匀强化,2例强化病灶内及周边可见血管影。1例MRI表现为边界清晰的软组织肿块,实性部分T1WI呈等信号,T2WI呈稍高信号,中心可见不规则黏液样变性,呈明显短T1、长T2信号,增强扫描病灶实性部分呈明显均匀强化,黏液样变性区无强化。结论 CT、MRI能清楚显示IMT的部位、大小及其与周围组织的关系,但表现无特异性,确诊仍依赖病理检查。
Objective To investigate the CT and MRI findings of inflammatory myofibroblastic tumor (IMT) in abdomen to improve its diagnostic value. Materials and Methods The clinical and imaging data of 6 patients with IMT confirmed by pathology were retrospectively analyzed. Including men and women in 3 cases, aged 1 to 61 years, mean 35.5 years old. 5 routine CT scan, of which 4 cases plain scan and enhanced scan, plain scan only one case; 1 case of MRI plain scan and enhanced scan. Results 4 cases of mesentery, transverse colon in 1 case, 1 case of posterior prostate. 5 cases of single lesions, 1 case of multiple lesions, partially integrated with each other. 4 cases of clear boundary, 2 cases are not clear. The maximum diameter of lesions 5.3 ~ 15.4cm. CT scan showed uniform density in 4 cases, uneven density in 1 case, and CT value of 25 ~ 58HU. Three cases of enhanced scan showed obvious enhancement, including 2 cases of uneven enhancement, 1 case of uniform enhancement, 1 case of mild enhancement and 2 cases of enhancement Strengthen the lesion and the surrounding blood vessels can be seen. One case of MRI showed soft tissue mass with clear border. Solid T1WI showed equal signal, T2WI showed slightly higher signal, irregular mucinous degeneration was observed in the center, and obvious short T1 and long T2 signals were evident. The solidified part of enhanced MRI showed obvious Uniform enhancement, mucoid degeneration without enhancement. Conclusion CT, MRI can clearly show the location of IMT, its size and its relationship with the surrounding tissue, but the performance of non-specific diagnosis is still dependent on pathological examination.