肾上腺肿瘤的螺旋CT诊断及鉴别诊断

目的：总结肾上腺肿瘤的CT表现及特征，评价螺旋CT对肾上腺肿瘤的诊断和鉴别诊断价值。方法：回顾性分析36例经手术病理证实的各类肾上腺肿瘤的CT征象，提出诊断与鉴别诊断要求。结果：皮质腺瘤14例，大小、密度中等；皮质腺癌4例，肿块较大不规则，密度不均匀，中心有低密度坏死；嗜铬细胞瘤9例，单侧瘤体较大，平扫密度不均匀，实质部分强化明显；髓质脂肪瘤3例，低密度的脂肪显示是其特征性CT表现；转移瘤5例，多为肺癌转移，肿块呈圆形或不规则形，密度不均匀，中等强化；肾上腺囊肿1例，凹值低而均匀，壁薄规则。结论：肾上腺肿瘤CT表现有一定的特征性，认真分析，结合临床及生化检查，可对其作出定性诊断。

Spiral CT in diagnosis and diferential of adrenal tumors

Objective：To summarize the CT features of adrenal tumors and to assess the value of spiral CT in diagnosis and diferential diagnosis of the disease. Methods：The CT findings of 36 cases with pathologically proved adrenal tumors were analyzed retrospectively and the key points in diagnosis were presented. Results： Fourteen cases had adenoma of middle size and density;4 had adenoeareinoma with irregular mass of uneven density and central low-density necrosis; 9 cases had pheochromocytoma with a larger mass of heterogeneous density with marked enhancement： 3 cases of myelipoma were characterized by low density areas for fat contents;5 cases of metastasis. Almost all of which resulted from the pulmonary cancer, displayed a round or iregular mass of heterogeneous density with middle-level enhancement; 1 ease of adrenal cyst presented low and heterogeneous density with thin and regular cyst wall. Conclusion： Adrenal tumors have certain CT characteristic signs. CT findings combined with clinical and laboratory data can provide correct diagnosis.