The author has no funding, financial relationships, or conflicts of interest to disclose.
Management of patients with acoustic neuromas: A Markov decision analysis†
Article first published online: 8 MAR 2010
Copyright © 2010 The American Laryngological, Rhinological, and Otological Society, Inc.
Volume 120, Issue 4, pages 783–790, April 2010
How to Cite
Morrison, D. (2010), Management of patients with acoustic neuromas: A Markov decision analysis. The Laryngoscope, 120: 783–790. doi: 10.1002/lary.20819
- Issue published online: 22 MAR 2010
- Article first published online: 8 MAR 2010
- Manuscript Accepted: 23 NOV 2009
- Acoustic neuroma;
- decision analysis;
- gamma knife;
- microsurgical resection;
- Level of Evidence: 2b.
The management of patients with small (<1.5 cm) acoustic neuromas is controversial. Immediate treatment via microsurgical resection or radiosurgery is often advocated. A period of observation is sometimes advised followed by microsurgery or radiosurgery for tumors that demonstrate growth during the observation period. The purpose of this study is to calculate quality-adjusted life expectancy for the most commonly applied management strategies in hypothetical cohorts of patients of various ages.
Markov decision analysis; societal perspective.
Assumptions used in creating this model and event probabilities were obtained from a thorough literature review. Key parameters were identified and defined by the best available evidence. The main outcome measure is the benefit derived from each management strategy in quality-adjusted life years (QALYs). Sensitivity analysis was used to define benchmark performance information for these parameters.
The benefit of a period of observation followed by radiosurgery, if needed, for significant tumor growth is greater then all other strategies for all age groups and both sexes. When compared to observation followed by microsurgery, the additional benefit is small. QALY totals for the two immediate treatment groups were significantly lower than that for the observation groups.
For patients of all ages, a period of observation during which tumor growth and hearing thresholds are closely monitored is the superior strategy. For tumors that grow substantially or when hearing deteriorates, definitive management via radiosurgery is recommended. Laryngoscope, 2010