Atypical choroid plexus papilloma

Last revised by Yaïr Glick on 4 Apr 2023

Citation, DOI, disclosures and article data

Citation:

Gaillard F, Glick Y, Atypical choroid plexus papilloma. Reference article, Radiopaedia.org (Accessed on 23 Apr 2024) https://doi.org/10.53347/rID-51996

DOI:

https://doi.org/10.53347/rID-51996

Permalink:

https://radiopaedia.org/articles/51996

rID:

51996

Article created:

17 Mar 2017, Frank Gaillard ◉ ◈

Disclosures:

At the time the article was created Frank Gaillard had no recorded disclosures.

View Frank Gaillard's current disclosures

Last revised:

4 Apr 2023, Yaïr Glick ◉

Disclosures:

At the time the article was last revised Yaïr Glick had no financial relationships to ineligible companies to disclose.

View Yaïr Glick's current disclosures

Revisions:

4 times, by 2 contributors - see full revision history and disclosures

Systems:

Central Nervous System

Atypical choroid plexus papillomas are WHO grade 2 tumors derived from choroid plexus epithelium with intermediate clinical and pathological features between more indolent choroid plexus papillomas and more aggressive choroid plexus carcinomas.

As clinically, and on imaging, they are difficult to distinguish from choroid plexus papillomas and therefore their description is not repeated here.

Pathology

Atypical choroid plexus papillomas are considered WHO grade 2 tumors in the current (2021) WHO classification of CNS tumors ². They are distinguished from choroid plexus papillomas primarily on the basis of increased mitotic activity (≥2 mitoses per 10 high-power fields; choroid plexus carcinomas have ≥5 mitoses per 10 high-power fields) ¹.

Other features that may be present include ¹: