Abstract:
BACKGROUND:Resection of cerebellopontine angle (CPA) meningiomas may result in significant neurological morbidity. Radiosurgery offers a minimally invasive alternative to surgery. OBJECTIVE:To evaluate, in a multicenter cohort study, the outcomes of patients harboring CPA meningiomas who underwent Gamma Knife radiosurgery (GKRS). METHODS:From 7 institutions participating in the North American Gamma Knife Consortium, 177 patients with benign CPA meningiomas treated with GKRS and at least 6 months radiologic follow-up were included for analysis. The mean age was 59 years and 84% were female. Dizziness or imbalance (48%) and cranial nerve (CN) VIII dysfunction (45%) were the most common presenting symptoms. The median tumor volume and prescription dose were 3.6 cc and 13 Gy, respectively. The mean radiologic and clinical follow-up durations were 47 and 46 months, respectively. Multivariate regression analyses were performed to identify the predictors of tumor progression and neurological deterioration. RESULTS:The actuarial rates of progression-free survival at 5 and 10 years were 93% and 77%, respectively. Male sex (P = .014), prior fractionated radiation therapy (P = .010), and ataxia at presentation (P = .002) were independent predictors of tumor progression. Symptomatic adverse radiation effects and permanent neurological deterioration were observed in 1.1% and 9% of patients, respectively. Facial spasms at presentation (P = .007) and lower maximal dose (P = .011) were independently associated with neurological deterioration. CONCLUSION:GKRS is an effective therapy for CPA meningiomas. Depending on the patient and tumor characteristics, radiosurgery can be an adjuvant treatment to initial surgical resection or a standalone procedure that obviates the need for resection in most patients.
journal_name
Neurosurgeryjournal_title
Neurosurgeryauthors
Ding D,Starke RM,Kano H,Nakaji P,Barnett GH,Mathieu D,Chiang V,Omay SB,Hess J,McBride HL,Honea N,Lee JY,Rahmathulla G,Evanoff WA,Alonso-Basanta M,Lunsford LD,Sheehan JPdoi
10.1227/NEU.0000000000000480subject
Has Abstractpub_date
2014-10-01 00:00:00pages
398-408; quiz 408issue
4eissn
0148-396Xissn
1524-4040journal_volume
75pub_type
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