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目的探讨含脂肪肾上腺良性肿瘤的CT表现特征。方法对经病理证实19例含脂肪肾上腺良性肿瘤的CT表现进行回顾性分析,19例均行CT平扫,其中9例行增强扫描。结果肾上腺髓脂瘤13例,脂肪瘤及成熟畸胎瘤各2例,血管平滑肌脂肪瘤和脂肪瘤样节细胞神经瘤各1例。均表现为边缘清楚含脂肪混杂密度影。13例髓脂瘤中,11例以脂肪密度为主,其余2例以骨髓组织为主。其中3例内见点状钙化影,6例增强扫描髓样组织均呈轻度强化。2例脂肪瘤均表现为边缘清楚均匀一致脂肪密度影。2例成熟畸胎瘤内含有多发钙化灶、软组织及脂肪密度影,其中软组织呈轻度强化;肾上腺血管平滑肌脂肪瘤1例,部分实性成分增强扫描呈明显强化。脂肪瘤样节细胞瘤以脂肪密度为主,实性部分较少,增强扫描具有渐进性强化特征。结论含脂肪肾上腺良性肿瘤种类繁多,其CT表现具有一定的特征。
Objective To investigate the CT features of benign adrenal tumors. Methods The CT findings of 19 cases with benign fatty adrenal tumors confirmed by pathology were analyzed retrospectively. All of the 19 cases underwent CT scan, of which 9 cases underwent enhanced scan. Results 13 cases of adrenal myeloma, 2 cases of lipoma and mature teratoma, 1 case of angiomyolipoma and 1 case of lipoma-like ganglion neuroma. All showed a sharp edge with fat mixed density shadow. In 13 cases of myeloma, 11 cases were mainly fat density, and the remaining 2 cases were mainly bone marrow. See 3 cases of punctate calcification, 6 cases of enhanced scan medullary tissue showed mild enhancement. 2 cases of lipoma showed a uniform and clear edge of the fat density shadow. Two cases of mature teratoma contained multiple calcifications, soft tissue and fat density, soft tissue was slightly enhanced; adrenal angiomyolipoma in 1 case, some of the solid component enhancement scan was significantly enhanced. Lipoma-like section of tumor cells mainly in the density of fat, less solid parts, enhanced scanning with progressive enhancement features. Conclusion There are various types of benign adrenal tumors with some features of CT.