Surgical Outcomes in Large Vestibular Schwannomas: Proposed Koos Grade V and Radiological Risk Features

AND OBJECTIVES: In the multimodality era, surgery is largely reserved for large vestibular schwannomas (VSs), with high expectations for safety and durable tumor control. The Koos grading system is simple and widely used, but conventional Koos grade IV encompasses heterogeneous risk profiles....

Neurosurgeons and multidisciplinary teams managing large vestibular schwannomas may find the proposed Koos Grade V classification and associated radiological risk features useful for surgical planning, though independent validation is needed before adoption.

A standardized higher-grade classification for the largest vestibular schwannomas could improve surgical risk stratification and outcome prediction in a complex patient population that often requires multimodal treatment.

1. 01Study proposes a new 'Koos Grade V' category for the largest vestibular schwannomas.
2. 02Specific radiological features on imaging are identified as risk predictors for surgical outcomes.
3. 03Findings are set in the context of modern multimodality treatment (surgery + radiosurgery).
4. 04Retrospective or single-centre design likely limits immediate generalisability.
5. 05Independent prospective validation of the Koos Grade V criteria is needed.

PMID

42294913

DOI

10.1227/ons.0000000000002104.

Journal

Operative Neurosurgery

Publication type

research_article

Evidence level

4

Population

Patients with large vestibular schwannomas undergoing surgical treatment

Intervention

Surgical treatment of large vestibular schwannomas with proposed Koos Grade V classification applied

Comparator

Existing Koos Grade I–IV classification system