较大肾上腺嗜铬细胞瘤的MRI及DSA诊断(附6例分析)

目的：评估较大肾上腺嗜铬细胞瘤的ＭＲＩ及ＤＳＡ的诊断价值。材料与方法：６例经手术病理证实的较大肾上腺嗜铬细胞瘤,均行ＭＲ平扫及腹主动脉、肾上腺动脉造影检查。结果：６例ＭＲ表现均为长Ｔ１长Ｔ２信号,２例见囊变和坏死信号。５例主要波及肝右叶和肾上极,１例主要波及胰头并包绕下腔静脉。６例中,４例颖诊嗜铬细胞瘤,２例诊断为巨块型肝癌。ＤＳＡ显示瘤体由肾上腺动脉供血,肿瘤血管丰富,染色浓密,诊断为嗜铬细胞瘤

Application of MRI and DSA in the large adrenal pheochromocytoma

Objective:To evaluate the diagnostic value of MRI and DSA in the large adrenal pheochromocytoma.Methods:6 patients with adrenal pheochromocytoma proved by operation and pathology were performed MRI and adrenal arteriography.Results:On MRI,the tumor of 6 cases was presented as long T1 and T2 relaxation time,and cystic or necrotic signal intensity was shown in 2 of the 6 cases.Right hepatic lobe and the upper pole of kidney were invaded by tumor in 5 cases,and invasion of the head of pancreas with encasement of IVC by tumor was seen in 1 case.Among 6 cases of MRI,4 were diagnosed as adrenal pheochromocytoma,and 2 were misdiagnosed as hepatocellular carcinoma.DSA demonstrated all of the tumors with hypervascularity supplied from adrenal arteries and tumor staining,and therefore,a resultant diagnosis of adrenal pheochromocytoma was made.Conclusions:DSA is necessary for diagnosing large adrenal pheochromocytoma in some cases,since it is poorly differentiated from the tumor of adjacent organs on MRI.