肾上腺节细胞神经瘤的CT表现

目的探讨肾上腺节细胞神经瘤的CT表现特征，提高其CT诊断的准确性。方法回顾性分析经手术病理证实的10例肾上腺节细胞神经瘤患者的CT表现，并与病理进行对照分析。结果10例肾上腺节细胞神经瘤均为单发病灶，术前均行cT平扫及动态增强扫描。肿瘤直径2．3～6．4cm，平均3．8cm。6例cT平扫为相对均匀的低密度，低于腹主动脉，近似水样密度，3例合并点状、条状钙化。增强扫描4例动脉期表现为无强化，6例表现轻微强化。所有病例静脉期均为轻度强化，较动脉期呈逐渐强化改变。1例出现细线状、分隔状强化，4例肉眼观类似囊性肿瘤。所有病例边界清楚，肿瘤质地较软，3例瘤体较大沿周同器官间隙呈嵌入性生长，推压或包绕邻近周围血管但血管无狭窄。结论肾上腺节细胞神经瘤瘤体较软，具有特定生长方式，瘤体较大时呈嵌人性生长。肿瘤平扫密度较低，部分肉眼观类似囊性肿瘤，动态增强扫描呈无强化或轻度强化，静脉强化呈渐进强化。

CT features of adrenal ganglioneuroma

Objective To explore the CT features of adrenal ganglioneuroma and to evaluate its clinical value. Methods The CT images of all 10 patients with adrenal ganglioneuromas confirmed by surgical pathology were re- viewed and analyzed retrospectively in comparison with pathological results. Results Single lesion was found in all patients, and both CT plain and enhanced scan were performed before operation. The diameter of the tumors was 2.3- 6.4 cm, with a mean diameter of 3.8 cm. The CT plain scan showed relatively homogeneous low-density in 6 patients, lower than abdominal aorta and similar to water-like density ,and scattered mottled or strip calcification in 3 patients. No obvious enhancement in arterial phase in 4 patients, and slight enhancement in 6 patients. Slight and increasing enhancement was seen in portal phase in all patients. One patients showed thin line and comparted shaped enhance- ment , and 4 patients showed cystic tumor shaped by naked eye. The masses were well defined and the bodies were soft. The tumors of 3 patients, were big , wedging into the space between adjacent organs and structures, and corn pressing or encasing the vessels nearby with vascular stenosis. Conclusion The tumor body of adrenal ganglioneuroma is soft and has specific growth mode ,showing a tendency of wedging into the space between adjacent organs and structures when the tumor is big. The CT plain scan show low-density, some cases show cystic tumor shaped by naked eye. No obvious or slight enhancement shows in dynamic CT ,and increasing enhancement is seen in portal phase.