Subdural Myodil Mimicking Filum Terminale Lipomas-Pitfall in Fat-Suppression MR Imaging: A Case Report

脊椎硬膜下之Myodil類似脊髓終絲脂肪瘤：病例報告

高常發(Sheung-Fat Ko) ； 吳樹鏗(Shu-Hang Ng) ； 李子瑜(Tze-Yu Lee) ； 蔡春泉(Chung-Chueng Tsai)

《中華放射線醫學雜誌》 20卷1期 (1995/03) Pp. 75-78

摘要

一病人在腰椎磁振造影T1影像中於脊髓終絲旁顯示線狀及梭狀之高訊號，壓抑脂肪技術(Fat-supprossion technique)進一步顯示此高訊號與腰椎硬膜外之脂肪的訊號一起被去除，因此此病灶被診斷為脊髓終絲脂肪瘤，但在X光素片中，我們發現脊椎硬膜下殘餘之油性顯影劑(Myodil)，才是造成磁振造影不正常高訊號的原因。由此病例，作者們獲得一寶貴經驗，雖然磁振造影被推崇為檢查脊椎病變之最佳工具，但在診斷脊椎脂肪瘤前，即使有壓抑脂肪磁振影像輔助，切記要檢視X光素片後，才作出最適當之診斷。

關鍵字

顯影劑 ； 磁振造影，壓抑脂肪 ； 脊髓造影，顯影劑 ； 脊髓，磁共振 ； 脊髓，腫瘤

並列摘要

A patient is described in whom linear or fusiform hyperintensities near the filum terminale were shown on T1-weighted magnetic resonance (MR) images. Fat-suppression technique suppressed these high signals comparable to those of the epidural fat. Filar lipomas were initially diagnosed, but a plain lumbar spine radiograph revealed subdural Myodil accounting for the MR signal change. It is believed, thus, that fat-suppression technique cannot differentiate a fat-containing tumor from Myodil. Correlation with findings by plain radiograph is suggested whenever spinal lipoma is suspected on the basis of MR.

並列關鍵字

Contrast medium ； magnetic resonance MR, fat-suppression ； myelography, contrast medium ； spinal cord, MR ； spinal cord, neoplasms