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The behavior of residual tumors following incomplete surgical resection for vestibular schwannomas

 Hun Ho Park  ;  So Hee Park  ;  Hyeong-Cheol Oh  ;  Hyun-Ho Jung  ;  Jong Hee Chang  ;  Kyu-Sung Lee  ;  Won Seok Chang  ;  Chang-Ki Hong 
 SCIENTIFIC REPORTS, Vol.11(1) : 4665, 2021-02 
Journal Title
Issue Date
The management of vestibular schwannoma (VS) with residual tumor following incomplete resection remains controversial and little is known regarding postoperative tumor volume changes. The behavior of residual tumors was analyzed for 111 patients who underwent surgery for newly diagnosed VS between September 2006 and July 2017. The postoperative tumor volume changes were assessed during a mean follow-up of 69 months (range 36-147 months). Fifty-three patients underwent imaging surveillance following incomplete resection. There was no residual tumor growth in 44 patients (83%). A significant regression of residual tumor volume was noted in the no growth group at postoperative 1 year (p = 0.028), 2 years (p = 0.012), but not from 3 years onwards. Significant predictors of regrowth were immediate postoperative tumor volume ≥ 0.7 cm3 (HR 10.5, p = 0.020) and residual tumor location other than the internal auditory canal (IAC) (HR 6.2, p = 0.026). The mean time to regrowth was 33 months (range 5-127 months). The 2-, 5-, and 10-year regrowth-free survival rates were 90.6%, 86.8%, and 83%, respectively. In conclusion, significant residual tumor regression could occur within 2 years for a VS with an immediate postoperative tumor volume less than 0.7 cm3 or residual tumor in IAC.
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1. College of Medicine (의과대학) > Dept. of Neurosurgery (신경외과학교실) > 1. Journal Papers
Yonsei Authors
Park, So Hee(박소희)
Park, Hun Ho(박현호) ORCID logo https://orcid.org/0000-0002-2526-9693
Lee, Kyu Sung(이규성)
Chang, Won Seok(장원석) ORCID logo https://orcid.org/0000-0003-3145-4016
Chang, Jong Hee(장종희) ORCID logo https://orcid.org/0000-0003-1509-9800
Jung, Hyun Ho(정현호)
Hong, Chang Ki(홍창기) ORCID logo https://orcid.org/0000-0002-2761-0373
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