肝炎性肌纤维母细胞瘤的影像学特征

目的：探讨肝炎性肌纤维母细胞瘤（hepatic inflammatory myofibroblastic tumor ，HIM T ）的影像表现特征，提高对该病的认识和诊断准确性。方法回顾性分析经病理证实的7例 HIM T的影像表现，其中4例行CT 扫描，3例行MR检查。结果7例7个病灶，位于肝右叶5例，位于肝左叶2例；CT 平扫呈低或稍低密度，T1WI为稍低信号，T2WI呈等或稍高信号；CT 及MR增强动脉期明显强化2例，轻中度强化4例，不强化1例；门脉期及延迟期持续明显强化6例，边缘强化1例。结论 HIM T影像表现多样，T2 WI呈等或稍高信号、动态增强门脉期及延迟期持续强化有一定特征，但本病少见，确诊尚需组织病理学及免疫组化检查。

Imaging features of hepatic inflammatory myofibroblastic tumor

Objective To investigate the imaging features of Hepatic inflammatory myofibroblastic tumor （HIM T ） and to improve the diagnosis .Methods Seven patients with pathology proved HIMT were reviewed retrospectively .CT scan was performed in 4 patients and MRI was performed in other 3 patients .Results Totally ,7 lesions were found in 7 pa-tients .5 lesions were in right lobe ,2 lesions were in left lobe .Slight low or low-density appeared on CT plain scanning , MRI was manifested as slightly low signal intensity lesions on enhanced T1WI and isointensity or mild hyper intensity on enhanced T2 WI .2 cases were significantly enhanced in arterial phase ,4 lesions were shown mild to moderate enhance-ment ,1 case was shown no enhancement .Portal venous phase showed and delayed phase continuous enhancement in 6 ca-ses ,edge enhancement in 1 case .Conclusion The imaging manifestations of HIMT were miscellaneous ,isointensity or mild hyper intensity on enhanced T2 WI ,dynamic enhancement in portal venous phase and delayed phase continued to strengthen with certain characteristics .As it is a rare disease ,the final decision depends on pathological and immunohisto-chemical examination .