副神经节细胞瘤的影像诊断

The imaging diagnosing of paraganglioma

目的探讨副神经节细胞瘤的影像特点,提高其诊断正准率。方法对25例副神经节细胞瘤的影像资料进行分析,探讨不同影像检查方法诊断副神经节细胞瘤的价值。结果 16例位于腹膜后、4例位于心脏、2例位于膀胱、2例位于胸腔近膈顶处、1例位于肝门区。以囊实性为主,与周围组织分界不清,MR 及 CT 平扫肿瘤信号及密度不均匀,增强扫描实性部分可明显强化。17例肾上腺髓质^(131)I-间碘苄胍(^(131)I-MIBG)显像阳性率为88.2%(15例);7例行生长抑素受体^(99)Tc^m-奥曲肽(^(99)Tc^m-octreotide)显像者,6例阳性。结论 CT、MRI 可显示肿瘤内部结构特征及与周围组织的关系,^(131)I-MIBG 显像有定性价值,^(99)Tc^m-octreotide 显像可提供补充信息。

Objective To explore the imaging characters of paraganglioma and enhance the diagnostic rate. Methods To analyze and summarize 25 paragangliomas imaging characters and compare the value between different imaging in diagnosing. Results Sixteen located in the retroperitoneal, 4 around heart, 2 perivesical, 2 in thoracic compartment near the dome of diaphram, 1 in porta hepatis. Most of them were solid and cystic ill-defined masses. On the Pre-contrast imaging, the signal and density is non- homogeneous. On the post-contrast imaging, the solid portion showed pronounced homogeneous enhancement. The positive rate were 88. 2% in adrenal medullary imaging（^131I-MIBG） （15/17）, six of seven were positive in somatostatin receptor （^99 Tc^m-octreotide）. Conclusion CT and MRI can show the internal characters and the relationship with surrounding tissue, ^131I-MIBG can make specific diagnosis. ^99Tc^m-octreotide can provide additional information.