巨大原发性无功能性肾上腺肿瘤的CT、MRI评价

Research on the evaluation of CT and MRI diagnosis in the large primary nonfunctional adrenal tumors

目的:探讨CT、MRI对巨大(>5.0 cm)原发性、无功能性肾上腺肿瘤的诊断及鉴别诊断价值。方法:对49例经临床及病理证实的巨大原发性无功能性肾上腺肿瘤的CT、MRI表现进行回顾性分析;对4例无功能性腺瘤患者、8例非腺瘤患者作化学位移成像(CSI)检查。结果:CT、MRI对肾上腺肿瘤定位、定性及判断肿瘤组织学类型的准确率分别为91%、93%、77%和94%、94%、79%。3例腺瘤患者在MRI反相位(OP)图像上的信号强度(SI)明显下降,SI指数平均为55%;8例非腺瘤和1例腺瘤患者的信号强度无明显下降。结论:CT、MRI对巨大原发性无功能性肾上腺肿瘤的定位和定性准确率较高,但其判断肿瘤组织学类型有一定的限度。

Objective：To investigate the value of CT and MRI in the diagnosis and differential diagnosis of the large primary nonfunctional adrenal tumors（5.0 cm）.Methods：CT and MRI features of the large primary nonfunctional adrenal tumors verified with clinical and pathology were investigated retrospectively in 49 cases.MR chemical shift imaging（CSI） was done in 12cases（nonfunctional adenoma 4 cases and non-adenoma 8 cases）.Results：The accuracies of location,qualitatively diagnoses（differentiating benign tumor from malignant tumor） and tissue characterization of CT and MRI were 91%,93%,77% and 94%,94%,79% respectively.Three nonfunctional adenomas exhibited the decrease in signal intensity（SI） on MR opposed-phase（OP） images,the average of SI index was 55%,non-adenomas and 1 nonfunctional adenoma showed no loss of signal intensity on OP images.Conclusion：CT and MRI are useful in the location and qualitatively diagnoses of the large primary nonfunctional adrenal tumors,but they have some limitation in the tissue characterization of tumors.