摘要
目的 总结肾上腺肿瘤的CT表现及特征 ,探讨鉴别诊断依据。资料与方法 搜集有完整CT资料并经手术病理证实的肾上腺肿瘤 4 9例 ,分析其大小、边缘、形态、密度及强化特征。结果 4 9例中 ,皮质腺瘤 19例 ,肿瘤直径为 1.0～ 4 .0cm ,有包膜 ,密度均匀但较低 ,强化较轻。皮质腺癌 4例 ,表现为不规则、分叶状、密度不均匀、环状强化的肿块。嗜铬细胞瘤 14例 ,单侧 ,良性 ,瘤体大 ,平扫不均匀 ,实质强化明显 ,低密度区无强化。髓质脂肪瘤4例 ,低密度的脂肪密度区是其特征性CT表现。转移瘤 5例 ,均为肺癌转移 ,多呈类圆形或不规则形肿块 ,密度均匀或不均匀 ,强化较明显。畸胎瘤 3例 ,CT可见脂肪密度和钙化。结论 肾上腺肿瘤CT表现有一定的特征性 ,结合临床及生化检查 ,做出诊断是有可能的。对于体积较大的肾上腺肿瘤 ,还需与其他腹膜后肿瘤相鉴别。
Objective To summarize CT features of adrenal tumors and to discuss the key points in its differentiation. Materials and Methods CT findings in 49 patients with pathologically proved adrenal tumors were retrospectively analyzed, focusing on the size, margin, morphology, density and enhancement pattern of the lesion.Results Of 49 cases, adenoma was seen 19, presenting as 1.0～4.0 cm encapsulated mass of low and homogeneous density with slight enhancement. Adenocarcinoma was seen in 4 cases and was manifested as irregular, lobulated mass of uneven density with ring like enhancement. Pheochromocytoma occurred in 14 cases and was marked by a mass of heterogeneous density on plain scans while showed marked enhancement on enhanced scans. Myelolipoma was found in 4 cases and presented as low density area characteristic for fat contents. Five cases had metastasis, all of which were from pulmonary cancers, displaying as a round or irregular mass of homo or hetero geneous density with marked enhancement. Three teratomas demonstrated fat density and calcifications.Conclusion Adrenal tumors have certain characteristic CT signs. A combination of CT findings with clinical and laboratory data can usually provide correct diagnosis. Differentiation from other retroperitoneal tumors is necessary when the tumor at adrenal region is larger.
出处
《临床放射学杂志》
CSCD
北大核心
2003年第4期307-310,共4页
Journal of Clinical Radiology
