BACKGROUND: Single-session stereotactic radiosurgery (SRS) treatment of vestibular schwannomas results in excellent tumor control. It is not known whether functional outcomes can be improved by fractionating the treatment over multiple sessions. OBJECTIVE: To examine tumor control and complication rates after multisession SRS. METHODS: Three hundred eighty-three patients treated with SRS from 1999 to 2007 at Stanford University Medical Center were retrospectively reviewed. Ninety percent were treated with 18 Gy in 3 sessions, targeting a median tumor volume of 1.1 cm3 (range, 0.02-19.8 cm3). RESULTS: During a median follow-up duration of 3.6 years (range, 1-10 years), 10 tumors required additional treatment, resulting in 3- and 5-year Kaplan-Meier tumor control rates of 99% and 96%, respectively. Five-year tumor control rate was 98% for tumors < 3.4 cm3. Neurofibromatosis type 2-associated tumors were associated with worse tumor control (P = .02). Of the 200 evaluable patients with pre-SRS serviceable hearing (Gardner-Robertson grade 1 and 2), the crude rate of serviceable hearing preservation was 76%. Smaller tumor volume was associated with hearing preservation (P = .001). There was no case of post-SRS facial weakness. Eight patients (2%) developed trigeminal dysfunction, half of which was transient. CONCLUSION: Multisession SRS treatment of vestibular schwannomas results in an excellent rate of tumor control. The hearing, trigeminal nerve, and facial nerve function preservation rates reported here are promising.
BACKGROUND: Single-session stereotactic radiosurgery (SRS) treatment of vestibular schwannomas results in excellent tumor control. It is not known whether functional outcomes can be improved by fractionating the treatment over multiple sessions. OBJECTIVE: To examine tumor control and complication rates after multisession SRS. METHODS: Three hundred eighty-three patients treated with SRS from 1999 to 2007 at Stanford University Medical Center were retrospectively reviewed. Ninety percent were treated with 18 Gy in 3 sessions, targeting a median tumor volume of 1.1 cm3 (range, 0.02-19.8 cm3). RESULTS: During a median follow-up duration of 3.6 years (range, 1-10 years), 10 tumors required additional treatment, resulting in 3- and 5-year Kaplan-Meier tumor control rates of 99% and 96%, respectively. Five-year tumor control rate was 98% for tumors < 3.4 cm3. Neurofibromatosis type 2-associated tumors were associated with worse tumor control (P = .02). Of the 200 evaluable patients with pre-SRS serviceable hearing (Gardner-Robertson grade 1 and 2), the crude rate of serviceable hearing preservation was 76%. Smaller tumor volume was associated with hearing preservation (P = .001). There was no case of post-SRS facial weakness. Eight patients (2%) developed trigeminal dysfunction, half of which was transient. CONCLUSION:Multisession SRS treatment of vestibular schwannomas results in an excellent rate of tumor control. The hearing, trigeminal nerve, and facial nerve function preservation rates reported here are promising.
Authors: Douglas Kondziolka; Samuel M Shin; Andrew Brunswick; Irene Kim; Joshua S Silverman Journal: Neuro Oncol Date: 2014-09-28 Impact factor: 12.300
Authors: Hossein Mahboubi; Ronald Sahyouni; Omid Moshtaghi; Kent Tadokoro; Yaser Ghavami; Kasra Ziai; Harrison W Lin; Hamid R Djalilian Journal: Otolaryngol Head Neck Surg Date: 2017-04-25 Impact factor: 3.497
Authors: Allen L Ho; Alexander Y Li; Eric S Sussman; Arjun V Pendharkar; Aditya Iyer; Patricia A Thompson; Armine T Tayag; Steven D Chang Journal: J Radiosurg SBRT Date: 2016
Authors: Myreille D'Astous; Allen L Ho; Arjun Pendharkar; Clara Y H Choi; Scott G Soltys; Iris C Gibbs; Armine T Tayag; Patricia A Thompson; John R Adler; Steven D Chang Journal: J Neurooncol Date: 2016-10-17 Impact factor: 4.130