Kido T, Yamashita Y, Sumi S, Baba Y, Takahashi M, Ootsuka Y, Ueda S
Department of Radiology, Kumamoto University School of Medicine, Japan.
J Comput Assist Tomogr. 1997 Mar-Apr;21(2):268-70. doi: 10.1097/00004728-199703000-00019.
The renal angiomyolipoma is a fairly common benign renal tumor composed of various proportions of smooth muscle, blood vessels, and fat. Because fat is present in virtually every case, the CT findings in angiomyolipomas are so distinctive that a histologic diagnosis may be suggested. In angiomyomas composed mainly of vascular tissue and muscle or in those in which recent hemorrhage has occurred, the majority of tumors may have soft tissue CT density values without apparent fatty component (1,2). In such cases, preoperative diagnosis is extremely difficult. In this case report, we detected a small amount of fatty tissue with a chemical shift GRE MRI technique, although CT failed to detect the fatty tissue.
肾血管平滑肌脂肪瘤是一种相当常见的肾脏良性肿瘤，由不同比例的平滑肌、血管和脂肪组成。由于几乎每个病例中都存在脂肪，肾血管平滑肌脂肪瘤的CT表现非常独特，以至于可以提示组织学诊断。在主要由血管组织和肌肉组成的血管肌瘤或近期发生出血的血管肌瘤中，大多数肿瘤的CT密度值可能为软组织密度，而无明显脂肪成分（1,2）。在这种情况下，术前诊断极其困难。在本病例报告中，尽管CT未能检测到脂肪组织，但我们通过化学位移GRE MRI技术检测到了少量脂肪组织。
