1·There are three clinically useful classifications of gray matter heterotopia: subependymal, band, and subcortical heterotopia.
临床上有三种分类：室管膜下、带状、皮层下灰质异位。
2·Subependymal lesions:127 calcified nodules were found on CT.
室管膜下病灶：CT发现钙化结节127个。
3·Subependymal heterotopia (SEH) can occur in isolation or with other neurologic and metabolic disorders.
室管膜下灰质异位(SEH)可以孤立的发生或伴有其他的神经或代谢性疾病。
4·Subependymal giant cell astrocytomas were detected in 2 cases, renal angiomyolipoma was detected in 1 case.
室管膜下巨细胞星形细胞瘤2例，肾血管平滑肌脂肪瘤1例。
5·Subependymal giant cell tumors are frequently calcified, appear heterogeneous on CT and MR scans, and show intense but inhomogeneous enhancement following contrast administration.
室管膜下巨细胞瘤常常钙化，在CT和MR上均不均匀。增强检查明显强化但是不均匀。