Scotti G, Scialfa G, Colombo N, Landoni L
J Comput Assist Tomogr. 1985 Nov-Dec;9(6):1037-41. doi: 10.1097/00004728-198511000-00006.
Magnetic resonance imaging was performed in eight patients with extramedullary cervical tumors; two were studied with a 0.15 T resistive system and six with a 0.5 superconductive unit. All tumors were verified surgically: Five meningiomas and three schwannomas were found. Magnetic resonance demonstrated the location and size of the tumors as well as their relationship with and mass effect on the adjacent spinal cord. Meningiomas showed a tendency to have relaxation times close to those of the normal parenchyma; in multiple echo sequences their signal tends to decay in a way similar to that of the spinal cord. The different signal from the surrounding cerebrospinal fluid sometimes provides a visual cleavage to define the extramedullary location of the neoplasm. Schwannomas and neurofibromas have a less constant behavior; their T2 relaxation time may be slightly longer than that of the spinal cord and the tumor may display a more intense signal in the T2 weighted images. Usually, however, the signal intensity of the extramedullary tumors is lower than that of the intramedullary.
对8例髓外颈椎肿瘤患者进行了磁共振成像检查；其中2例使用0.15T电阻系统进行研究，6例使用0.5T超导设备进行研究。所有肿瘤均经手术证实：发现5例脑膜瘤和3例神经鞘瘤。磁共振成像显示了肿瘤的位置和大小，以及它们与相邻脊髓的关系和对脊髓的占位效应。脑膜瘤的弛豫时间往往与正常实质相近；在多回波序列中，其信号衰减方式与脊髓相似。来自周围脑脊液的不同信号有时提供视觉上的界限以确定肿瘤的髓外位置。神经鞘瘤和神经纤维瘤的表现则不太一致；它们的T2弛豫时间可能略长于脊髓，并且在T2加权图像中肿瘤可能显示出更强的信号。然而，通常情况下，髓外肿瘤的信号强度低于髓内肿瘤。
