/Objectives: Microsurgery is the principal treatment for large vestibular schwannomas (VS) causing symptomatic brainstem compression. Koos grade 4 tumors remain anatomically heterogeneous. We evaluated surgical and functional outcomes and explored whether a study-specific subdivision, adapted from the Hannover T4a/T4b distinction, provides prognostic information beyond established clinical and surgical variables.
✦ The floor
Discussion
Signed responses from readers of the wire.
Morphological features of Koos grade 4 vestibular schwannomas may help surgeons predict facial nerve outcomes, but practice change requires validation in larger prospective series; no immediate protocol change is warranted from this single study alone.
Facial nerve preservation is the most consequential surgical outcome for patients undergoing vestibular schwannoma resection, and identifying reliable morphological predictors could meaningfully guide surgical planning.
- 01Study focused on Koos grade 4 (large) vestibular schwannomas undergoing microsurgery.
- 02Morphological heterogeneity of tumors was assessed as a predictor of facial nerve outcome.
- 03Findings suggest tumor shape/structure characteristics correlate with post-surgical facial nerve function.
- 04Results could inform pre-operative risk stratification for patients and surgical teams.
- 05Larger prospective validation studies are needed before clinical adoption.
Morphological heterogeneity of large vestibular schwannomas predicts facial nerve outcome after microsurgery.
studypartially supported- PMID
- 42795923
- DOI
- 10.3390/jcm15187153.
- Journal
- Journal of Clinical Medicine
- Publication type
- research_article
- Evidence level
- 4
- Population
- Patients with large (Koos grade 4) vestibular schwannomas undergoing microsurgery
- Intervention
- Microsurgery for Koos grade 4 vestibular schwannoma with morphological heterogeneity assessment
Primary outcomes
Facial nerve outcome after microsurgery; Morphological predictors of surgical outcome