The similarity between papillary ependymomas and choroid plexus papillomas has sometimes caused difficulty in pathological diagnosis. Choroid plexus carcinomas, of which there were two in this ...
The membranous pattern of staining was found in 10 of 41 cases, and the intracytoplasmic pattern was found in 2 of 41 cases of choroid plexus papillomas. The few positive cases of nonependymal CNS ...
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