髓外浆细胞瘤的CT与MRI表现

CT and MRI Features of Extramedullary Plasmacytoma

目的探讨不同部位髓外浆细胞瘤(EMP)的CT、MRI表现,以提高对该病的影像学认识。资料与方法收集经临床及病理证实的EMP患者6例,对其影像学资料进行回顾性分析和总结。结果 6例患者肿瘤分别位于上颌窦、面颊部、双侧扁桃体、肩胛肌、肾脏和睾丸。各部位病灶具有以下特点:①孤立的软组织肿块,边界较清楚。② CT/MRI表现:CT示肿瘤内部密度均匀,呈中等密度;MRI示病灶信号均匀,T1WI呈等或稍低信号,T2WI呈等或稍高信号,DWI表现为扩散受限;增强扫描呈中度-明显强化,强化较均匀。③可伴有病变邻近部位骨质破坏和病变区周围淋巴结肿大。结论 CT、MRI检查在EMP诊断、治疗及随访等方面可以提供更全面的信息。

Purpose To investigate the imaging features of CT and MRI in different extramedullary plasmacytoma（EMP） locations for improving the imaging understanding of it. Materials and Methods Imaging data of 6 patients with EMP confirmed by clinic and pathology were retrospectively analyzed and summarized. Results Lesions of the 6 patients were located in maxillary sinus, cheek, bilateral amygdala, scapular muscles, kidney and testis, respectively. Their features were as follows： ①1 general： an isolated soft tissue mass with clear boundary. ② CT/MRI manifestations, uniform and medium density in CT; uniform signal in MRI, isointense or hypointense on T1WI, isointense or hyperintense on T2WI and limited diffusion on DWI; and with uniform and moderate to marked enhancement after injection of contrast-medium. ③ destruction of adjacent bone and lymph adenectasis around the lesions. Conclusion CT and MRI can provide much overall and accurate information for the diagnosis, treatment and follow-up of EMP.