Okamoto K, Ito J, Tokiguchi S, Furusawa T, Yoshida S, Tanaka R, Iwanaga K, Oyanagi K
Department of Radiology, Niigata University, School of Dentistry, Japan.
Neuroradiology. 1996 Apr;38(3):214-6. doi: 10.1007/BF00596531.
We report a tentorial meningioma containing fat. Multiple areas of fatty density or intensity in the tumour were seen on CT and MRI, which corresponded histologically to lipomatous components. CT 10 years previously had demonstrated a smaller tumour without evidence of fatty components. We found only five cases in the literature in which fatty density was demonstrated within a meningioma on CT and a lipomatous component histologically proved. Xanthomatous change, with lipid in tumour cells, causes decrease in density on CT, but not to the levels of fat. As both lipomatous components and xanthomatous change show similar intensity on MRI, CT can be helpful in differentiating these two conditions. To our knowledge, our case is the only one in which the advent of fatty tissue was confirmed during follow-up.
我们报告一例含有脂肪的小脑幕脑膜瘤。CT和MRI显示肿瘤内有多个脂肪密度或信号区域，组织学上对应于脂肪瘤成分。10年前的CT显示肿瘤较小，无脂肪成分迹象。我们在文献中仅发现5例CT显示脑膜瘤内有脂肪密度且经组织学证实有脂肪瘤成分的病例。肿瘤细胞内有脂质的黄色瘤样改变可导致CT密度降低，但达不到脂肪的程度。由于脂肪瘤成分和黄色瘤样改变在MRI上表现出相似的信号强度，CT有助于区分这两种情况。据我们所知，我们的病例是唯一一例在随访期间证实出现脂肪组织的病例。
