Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2022 Mar 15;12:836504. doi: 10.3389/fonc.2022.836504

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2022 Brown, Early, Vasilijic and Stankovic

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

PMC Copyright notice

Illustrations and T1-weighted post-gadolinium MRI scans demonstrating the Koos Grading System for vestibular schwannoma (20). Grade I, small intracanalicular tumor; Grade II, small intracanalicular tumor with protrusion into the cerebellopontine angle; Grade III, tumor occupying the cerebellopontine cistern, touching but not compressing the brainstem; Grade IV, large tumor with brainstem compression. The illustrations were modified from SMART (Servier Medical Art), licensed under a Creative Common Attribution 3.0 Generic License (http://smart.servier.com).