Long-term outcome of stereotactic radiosurgery (Srs) in patients with acoustic neuromas

Journal Article · Sat Apr 01 04:00:00 EST 2006 · International Journal of Radiation Oncology, Biology and Physics

DOI:https://doi.org/10.1016/J.IJROBP.2005.1· OSTI ID:20793416

Combs, Stephanie E ^[1]; Thilmann, Christoph ^[2]; Debus, Juergen ^[2]; Schulz-Ertner, Daniela ^[2]

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1. Department of Radiation Oncology, University of Heidelberg, Heidelberg (Germany) and Department of Radiation Oncology, German Cancer Research Center, Heidelberg (Germany)
2. Department of Radiation Oncology, University of Heidelberg, Heidelberg (Germany)

Purpose: To evaluate the effectiveness and long-term outcome of stereotactic radiosurgery (SRS) for acoustic neuromas (AN). Patients and Methods: Between 1990 and 2001, we treated 26 patients with 27 AN with SRS. Two patients suffered from neurofibromatosis type 2. Before SRS, a subtotal or total resection had been performed in 3 and in 5 patients, respectively. For SRS, a median single dose of 13 Gy/80% isodose was applied. Results: The overall actuarial 5-year and 10-year tumor control probability in all patients was 91%. Two patients developed tumor progression after SRS at 36 and 48 months. Nineteen patients (73%) were at risk of treatment-related facial nerve toxicity; of these, 1 patient developed a complete facial nerve palsy after SRS (5%). A total of 93% of the lesions treated were at risk of radiation-induced trigeminal neuralgia. Two patients (8%) developed mild dysesthesia of the trigeminal nerve after SRS. The hearing preservation rate in patients with useful hearing before SRS was 55% at 9 years. Conclusion:: Stereotactic radiosurgery results in good local control rates of AN and the risk of cranial nerve toxicities is acceptable. As toxicity is lower with fractionated stereotactic radiotherapy, SRS should be reserved for smaller lesions.

• OSTI ID: 20793416
• Journal Information: International Journal of Radiation Oncology, Biology and Physics, Journal Name: International Journal of Radiation Oncology, Biology and Physics Journal Issue: 5 Vol. 64; ISSN IOBPD3; ISSN 0360-3016
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
AUDITORY ORGANS
DOSES
HAZARDS
NEOPLASMS
PATIENTS
RADIOTHERAPY
SURGERY
TOXICITY