Armington W G, Osborn A G, Cubberley D A, Harnsberger H R, Boyer R, Naidich T P, Sherry R G
Radiology. 1985 Nov;157(2):367-72. doi: 10.1148/radiology.157.2.4048443.
The computed tomographic appearances of 22 biopsy-proved supratentorial ependymomas were analyzed. Supratentorial ependymomas were usually intraparenchymal, larger than 4 cm, and cystic. Contrast enhancement was moderate to intense, with homogeneous or ring-enhancement patterns commonly seen. Intratumoral calcification was present in one-third of the cases, while hydrocephalus and peritumoral edema were seen in 50%. Intratumoral hemorrhage was not a characteristic of the lesion. In contrast to cellular ependymomas, malignant ependymomas and ependymoblastomas demonstrate higher attenuation prior to administration of contrast material, more intense enhancement, lower frequency of calcification within the tumor, and less distinct margination.
对22例经活检证实的幕上室管膜瘤的计算机断层扫描表现进行了分析。幕上室管膜瘤通常位于脑实质内，大于4 cm，呈囊性。增强扫描呈中度至明显强化，常见均匀或环形强化模式。三分之一的病例有瘤内钙化，50%的病例有脑积水和瘤周水肿。瘤内出血不是该病变的特征。与细胞性室管膜瘤相比，恶性室管膜瘤和室管膜母细胞瘤在注射对比剂前表现为更高的密度、更明显的强化、肿瘤内钙化频率更低以及边界更不清晰。
