| 不典型肾血管平滑肌脂肪瘤与肾癌的CT影像鉴别 |
| 投稿时间：2009-09-11 修订日期：2009-12-01 点此下载全文 |
| 引用本文：龙宇晖、秦卫和、付飞先.不典型肾血管平滑肌脂肪瘤与肾癌的CT影像鉴别[J].医学研究杂志,2010,39(1):100-102 |
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| 中文摘要:目的探讨不典型肾血管平滑肌脂肪瘤的CT表现，提高不典型肾血管平滑肌脂肪瘤的CT诊断水平，找出其与肾癌的CT影像鉴别点。方法不典型肾血管平滑肌脂肪瘤21例和肾癌24例，所有病例均经CT平扫及增强扫描。结果21例不典型肾血管平滑肌脂肪瘤平扫12例呈高密度，6例呈等密度，3例呈低密度，9例可见皮质掀起征。增强扫描示瘤体均匀强化。有7例可见延迟强化。24例肾癌CT平扫示瘤体16例呈低密度，3例呈高密度，5例呈混杂密度，2例可见钙化。增强扫描后，瘤体大多呈不均性强化，皮质期呈高密度，髓质期呈低密度，且造影剂有“快进快出”的表现，有8例可见假包膜，7例肾静脉及下腔静脉有瘤栓形成，10例可见腹膜后肿大淋巴结，3例可见肝内转移。结论CT扫描对不典型肾血管平滑肌脂肪瘤及肾癌的鉴别具有重要作用。 |
| 中文关键词:肾血管平滑肌脂肪瘤、肾癌、CT |
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| CT in the Differential Diagnosis of Atypical Renal Angiomyolipoma and Renal Carcinoma |
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| Abstract:ObjectiveTo investigate the CT appearances of atypical renal angiomyolipoma to raise the CT diagnosing level and search for the differential points from renal angiomyolipoma. MethodsTwenty-one patients with atypical renal angiomyolipoma and 24 patients with renal carcinoma underwent CT scan and enhanced scanning. ResultsCT results showed hyperintense in 12 of all 21 lesions of atypical renal angiomyolipoma, with iso-intensity in 6, hypointense in 3, and levering-cortex-up sign in 9 cases. The tumor body showed homogeneous enhancement on CT enhanced scanning and prolonged enhancement was noted in 7 cases. CT showed hyperintense in 3 of all 24 lesions of renal carcinoma, with mixed intensity in 5, hypointensity in 16, calcification in 2 cases. The majority of the tumor body showed heterogeneous enhancement on CT enhanced scanning with cortical hyperintensity and medullary low-intensity, and with contrast appeared fast wash-in and wash-out. Of all cases, 8 presented with pseudo-capsule, 7 with tumor embolus formation in the renal vein and inferior vena, 10 with retroperitoneal lymphadenectasis, and 3 with intrahepatic metastasis. ConclusionCT scanning proves to play critical role in differentiating the atypical renal angiomyolipoma from renal carcinoma. |
| keywords:Renal angiomyolipoma Renal carcinoma Computerized tomography |
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