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颅底软骨肉瘤是一种少见的生长缓慢的局部侵犯的肿瘤。作者回顾性研究了17例经手术及组织学确诊的颅底软骨肉瘤MR图象上肿瘤大小、位置、信号及肿瘤扩展的特点。男9例,女8例,年龄22～69岁。其中8例为术前MR检查,9例为术后复发或肿瘤残余。MR采用1.5T 13例,0.5T 2例,0.35T 1例。短TR/TE为400～800/20～30,长TR/TE为2000～3200/25～30。11例行静脉注射Gd-DTPA增强扫描。将肿瘤信号强度与肌肉及脑灰质相比分为低、等、高三类。信号又分为均匀及不均匀的。肿瘤强化程度分为轻度、中度、显著三级。手术前肿瘤大小为2.8cm×2.0cm×2.0 cm～5.3cm×6.5cm×5.5cm,复发或残余肿瘤为2.0cm×2.0cm×2.5cm～6.0cm×8.0cm×7.2 cm。
Skull base chondrosarcoma is a rare and slowly growing, locally aggressive tumor. The authors retrospectively reviewed the features of tumor size, location, signal and tumor spread on MR images of 17 skull base chondrosarcomas confirmed by surgery and histology. 9 males and 8 females, aged 22 to 69 years old. Among them, 8 were preoperative MR examination and 9 were postoperative recurrence or tumor residual. MR used 13 cases of 1.5T, 0.5T in 2 cases, 0.35T in 1 case. Short TR / TE 400 ~ 800/20 ~ 30, long TR / TE 2000 ~ 3200/25 ~ 30.11 routine intravenous Gd-DTPA enhanced scan. The tumor signal strength and muscle and gray matter divided into low, and so on, the three categories. Signal is divided into uniform and uneven. Tumor enhancement is divided into mild, moderate, significant three. The size of the tumor before surgery was 2.8 cm × 2.0 cm × 2.0 cm ~ 5.3 cm × 6.5 cm × 5.5 cm, and the recurrence or residual tumor was 2.0 cm × 2.0 cm × 2.5 cm ~ 6.0 cm × 8.0 cm × 7.2 cm.