MSCT对肾上腺转移瘤与无功能腺瘤的鉴别诊断价值

目的探讨多排螺旋CT(MSCT)对肾上腺转移瘤与无功能腺瘤的鉴别诊断价值。方法回顾分析经病理或临床证实的32例肾上腺转移瘤及9例无功能腺瘤的CT资料,包括平扫及增强扫查,并对原始图像进行多平面重组(MPR)。结果转移瘤多呈不规则或分叶状,33个瘤灶(84%)平扫CT值及强化程度>20Hu。无功能腺瘤7例呈类圆形,边界清楚,6例平扫及强化程度<20Hu,其中2例出现负CT值。8例瘤侧残存正常肾上腺。结论转移瘤与无功能腺瘤CT平扫密度、强化程度及是否瘤侧残存腺体有明显差异,可以鉴别。

Value of MSCT in Differential Diagnosis of Adrenal Metases and Nonfunctional Tumors

Objective To evaluate the value of MSCT in differential diagnosis of adrenal metasis tumor and nonfunctional adenomas. Method The CT information of 32 cases of adrenal metasis tumor and 9 eases non- functional adenomas proved by pathology and clinic were analyzed retrospectively, including CT plain scanning and enhanced scanning. Then the source images were reconstructed with multi-planar reformation （MPR）. Re- suits Most of adrenal metastasis tumor were irregular or lobulated mass. The CT attenuation and enhancement degree of 33 tumors （84%）were more than 20Hu. 7 eases of nonfunctional adenonma were found as oval-like shape with clear edge. The normal adrenal beside tumor remained in 8 cases. The CT attenuation and enhenee- ment degree in 6 cases were less than 20Hu, including 2 cases whose CT value were below zero. Conclusions There are significant diffremces in CT plain scanning density, enhencement degree and the residual of between nonfunctional adenoma and metastasis tumor.