节细胞神经瘤的CT、MRI影像表现

目的探讨节细胞神经瘤(ganglioneuroma,GN)的CT、MR表现,旨在提高影像认识。资料与方法收集手术病理证实的10例GN,CT平扫加增强7例、仅CT平扫2例、MR平扫加增强1例。分析总结病灶部位、形态、密度、边界、强化及与周围结构关系等影像特点。结果 10例GN病灶均单发,位于颈部(n=2)、后纵隔(n=1)、腹膜后间隙肾上腺外(n=3)、肾上腺(n=3)及跨椎管内外(n=1)。形态呈类椭圆形或不规则,在解剖间隙间呈"嵌入式"生长。CT平扫密度低于肌肉而高于水,内见斑点状钙化(n=5)及云絮状中等密度灶(n=5);MR平扫T1WI低信号,T2WI高信号,多期增强扫描病灶内云絮状实性灶轻度渐进性强化(n=5);肿块边界均清楚,推压周围结构、但未见浸润破坏征象(n=10);1例病灶与周围结构粘连严重手术未能完整切除。结论 GN的CT、MRI表现有一定特点,掌握其影像学特点有助于提高诊断正确率,MR在显示病灶与周围结构关系方面优于CT。

CT and MRI Manifestation of Ganglioneuroma

Objective The aim of study was to improve diagnostic accuracy by analyzing the CT and MRI image characteristic of ganglioneuroma （GN）. Materials and Methods 10 cases of patients with GN which were verified by pathology were studied. The findings of CT （n=9） and MR/（ n=l ） such as location, shape, density or signal, margin and enhance features of the lesions were analyzed. Results The lesions were located respectively at neck （n=2）, postmediastinum （n=l）, adrenal （n=3）, retroperitoneal （n=3） and vertebral canal （n=l）. All the masses were well defined. The shapes were oval or irregulm. Some masses wedged into the space between the adjacent organs and tissue or intervertebral foraminal. The major density was lower than muscle＇s were detected. The signal of MR TIWI was and higher than water＇s. Calcification （n=5） low and T2WI was high, Slight or moderate enhancement of solid ingredient were measured in delayed phases after inject contrast agent. The occupy space effect and no signs of infiltration or erosion were observed. The masses were well defined （n=10）. 1 mass hadn＇t been resected whole because of serious conglutination with adjacent organs. Conclusions CT and MRI contribute to diagnosis and differential diagnosis of GN. The utility of distinguish conglutination mass and adjacent organs or tissue was limited.