肾上腺节细胞神经瘤的CT、MRI表现及病理对照

CT and MRI features of adrenal ganglioneuroma:correlated with pathologic fidings

目的：总结分析肾上腺节细胞神经瘤的CT和MRI表现，提高对本病的认识。方法：回顾性分析经手术病理证实的19例肾上腺节细胞神经瘤患者的CT和MRI表现。15例患者行CT平扫及增强扫描，5例患者行MRI扫描，其中l例患者同时行CT和MRI检查。结果：19例病灶均为单发，位于右侧肾上腺者14例（73．6％），左侧肾上腺者5例（26．3％）。病灶最小者为2．0cm×2．0cm，最大者为10cm×7．0cm。肿瘤边界清楚，CT平扫密度低于肌肉组织，CT值20～30HU，增强扫描动脉期无明显强化，静脉期、延迟期呈轻度强化。2例（10．5％）肿块边缘见点状钙化。5例行MRl扫描的病例中，病灶T1wI呈低信号，T2wl呈高或稍高信号，增强扫描动脉期病灶无明显强化，静脉期、延迟期呈轻度强化。结论：CT、MRI能很好地显示肾上腺节细胞神经瘤的影像学特点，并能清晰显示病灶与周围组织结构的关系，有助于和肾上腺其他病变的鉴别。

Objective：To analyze the CT and MRI findings of adrenal ganglioneuroma. Methods： CT and MRI images of 19 cases of pathological proven adrenal ganglioneuroma were retrospectively analyzed. 15 cases underwent CT scan and 5 cases underwent MRI. One patient underwent CT and MRI. Results zAll cases appeared as solitary lesions,in which 14 cases located in right adrenal and 5 cases in the left. The size of the lesions were 2.0cm× 2.0cm to 10.0cm× 7.0cm. The CT val- ue of the lesions were 20-30HU （lower than muscle）. The lesions showed no enhancement in the artrial phase of CT en- hancement;and slight enhancement in venous phase and delayed phase. 2 cases （10.5 %） have punctate calcification in the margin of the lesion. On MRI images, the lesions appeared hypointense on T1WI and hyperintense on Tz WI. On MRI en- hancement, all cases showed no enhancement on arterial phase, and slight enhancement in venous phase and delayed phase. Conclusion：CT and MRI can show the image characteristics of adrenal ganglioneuroma, and demonstrate the relationship with surrounding tissues. They are helpful for the differentiation of other adrenal diseases.