颅底脊索瘤的CT、MR影像诊断

目的 探讨ＣＴ、ＭＲ对颅底脊索瘤的诊断价值。方法 回顾性分析７１例病理证实的颅底脊索瘤的ＣＴ、ＭＲ影像表现及特点。结果 ７１例脊索瘤中,发生在斜坡３９例、鞍区１８例、颅中凹１２例和颈静脉孔区２例。３７例肿瘤内可见小囊变、坏死灶。２１例经ＭＲ检查者见肿瘤内有小出血灶。６３例可见邻的骨结构破坏。５０例经ＣＴ检查的病例中,４１中人有斑块样高密度钙化影。２７例可见非均匀性轻度增强,肿瘤边缘清楚。３９例肿瘤

CT and MR Imaging of Chordomas in the Skull Base

Objective To delineate the CT and MR imaging features of chordomas in the skull base. Methods CT and MR imaging studies of 71 patients with the chordomas arising from the skull base. Results In this series of 71 chordomas,39 located in the clival region,18 in the sella turcica,12 in the middle cranial fossa and 2 in the region of jugular foramen.The cystic components or necrosis were intratumoral in 37 patients and bony invasion in 63 cases.Intratumoral calcification was found in 41 cases with CT examination and hemorrhage in 21 cases with MR scan.Slight heterogeneous enhancement was found in 27 cases,intermediate heterogeneous enhancement in 39 and intermediate homogeneous enhancemet in 5. Conclusion CT was able to find intratumoral calcification. MRI was superior to CT for delineating the growth style of the tumor and its relationship to the surrounding anatomic structures. [