脑囊肿一般指的是蛛网膜囊肿，是脑脊液样的囊液被包围在蛛网膜所形成的袋状结构而成，有先天性和继发性两种类型，前者为最常见的蛛网膜囊肿，后者是由于颅内炎症、颅脑外伤或手术后引起。
室管膜囊肿是少见的颅内病变，可以见于脑实质、脑室或蛛网膜下腔。
Ependymal cysts are rare intracranial lesions that are found in the brain parenchyma, ventricles, and subarachnoid space.
结论脑内型表皮样囊肿的MRI表现具特征性，MRI表现有助于对该病的诊断。
Conclusion MRI findings of intracranial epidermoid cyst are relatively characteristic, and are helpful to the diagnosis.
囊肿常常邻近于脑室的脑实质内，累及额叶或颞叶。
The cysts are most often juxtaventricular in location within the brain parenchyma involving the frontal or temporal lobes.
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