Papillary ependymoma

CNS tumor

Ependymal tumors

Author: Eman Abdelzaher, M.D., Ph.D.

Topic Completed: 1 August 2012

Minor changes: 25 September 2020

Copyright: 2002-2021, PathologyOutlines.com, Inc.

PubMed Search: Ependymoma [title] papillary

Page views in 2020: 2,787

Page views in 2021 to date: 1,022

Table of Contents

Definition / general | Microscopic (histologic) description | Positive stains | Electron microscopy description | Differential diagnosis

Cite this page: Abdelzaher E. Papillary ependymoma. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/cnstumorependymomapapillary.html. Accessed April 18th, 2021.

Definition / general

Rare; resembles choroid plexus papilloma

Microscopic (histologic) description

Forms extensive redundant epithelial-like surfaces
Not on fibrovascular stroma

Positive stains

GFAP, reticulin (accentuates pattern), vimentin, EMA

Electron microscopy description

Frequent intercellular microrosettes, microvilli, cilia, zonulae adeherentes

Differential diagnosis