脊索瘤是一种源于胚胎性脊索残余组织的低度恶性肿瘤,好发于中线颅底部及骶尾部,呈缓慢进行性侵袭样生长。鼻咽部是颅底脊索瘤的一个独特好发部位,由于病变在解剖深处多区域累及,生物学上很难全切,而其预后很大程度上取决于手术切除程度。术中MRI(intraoperative magnetic resonance imaging,iMRI)可在患者离开手术室前实时更新影像学数据,提高病变切除率,及时发现 Chordoma is a low-grade malignancy derived from the residual tissue of the embryonic chordal cord. It occurs predominantly at the base of the midline skull and the sacrococcygeal and develops slowly and invasively. Nasopharynx is a unique predilection site for skull base chordoma. Because lesions are involved in multiple regions in the depth of anatomy, it is difficult to biologically cut, and its prognosis depends largely on the degree of surgical resection. Intraoperative magnetic resonance imaging (MRI) can be used to update the imaging data in real time before the patient leaves the operating room to improve the rate of lesion resection and find out in time