30例肾上腺肿瘤的CT表现特征分析

Analysis of the Mainifestation and Feature of Adrenal Tumor on CT in 30 Cases

目的 分析肾上腺肿瘤的CT表现特征。方法 回顾性分析 30例经手术病理证实的各类肾上腺肿瘤的CT征像 ,提出诊断与鉴别诊断的要点。结果 纤维黄色瘤呈中等度大小 ,密度不均匀 ,轻度强化 ;嗜铬细胞瘤肿块较大 ,密度不匀 ,强化明显 ;髓性脂肪瘤CT值呈脂肪密度 ;囊肿的CT值偏低 ,囊肿壁可有钙化 ;醛固酮腺瘤小 ,密度低 ;皮质醇腺瘤中等大小 ,中等密度 ;皮质腺癌肿块较大且不规则 ,内有低密度区 ;肾上腺转移癌肿块较大 ,密度不均匀。结论 认真分析影像学特征 ,提高肾上腺肿瘤诊断的准确率是可能的。

Objective To analyze the manifestion and the feature of adrenal tumor with CT.Me thods The findings of various adrenal tumors with CT in 30 cases were analyzed retrospectively,the key to the diagnosis and differential diagnosis was suggested.Results Usually, fibroxanthoma is inhomogeneous in density and maderate in size and was enhanced slightly after contrast medium administration. Pheochromocytoma is always larger and inhomogeneous in density and was enhanced markedly. The CT unit of myelolipoma simulated those of fluid or fat. Adrenal cyst has a low CT value and it showed cystic wall calcification. Aldosteronism adenoma was low in density and small in size, while cortisol adenoma was moderate in density and medium in size. Adrenocortical adenocarcinoma was the larger one with irregular margin and irrgular hypodense areas inside. Metastatic cancinoma was larger and inhomogeneous in density.Conclusion It is possible to increase the diagnostic rate by analysing the imaging feature of adrenal tumor.