Use of 532-nm Pulsed Potassium Titanyl Phosphate Laser and Adjuvant Intralesional Bevacizumab for Aggressive Respiratory Papillomatosis in Children

Abstract

To describe the initial pediatric experience with intralesional bevacizumab (Avastin) treatment for children with severe, recurrent respiratory papilloma (RRP). Retrospective medical chart review. Tertiary care multidisciplinary aerodigestive center. Three children, aged 3 to 6 years, with severe RRP requiring more than 4 operative interventions in 1 year whose parents (or legal guardians) consented to adjuvant treatment with intralesional bevacizumab. All 3 children were treated as follows: surgical debridement with a microdebrider, pulsed potassium titanyl phosphate laser treatments, and adjuvant intralesional injections with bevacizumab (1.25 mg total). Time interval between operative interventions, Derkay severity scale for RRP, and pediatric voice-related quality of life (PVRQOL) scores. All 3 children demonstrated increased time between operative interventions. Two children had a substantial decrease in their Derkay score and improved PVRQOL scores. One child, although time between operative interventions improved, did not have any change in Derkay score and required further adjuvant therapy. Injectable bevacizumab appears to show some efficacy in prolonging the time between treatments and therefore reducing the number of treatments per year in children with severe RRP. However, before any meaningful conclusions can be drawn, further studies must be conducted in the form of head-to-head trials looking specifically at the issues of time between treatment intervals, efficacy of one adjunct over another, vocal outcomes, and whether several adjunctive treatments confer advantage over 1 treatment. In-depth and careful informed consent is mandatory for these studies so that parents are aware of the risks and benefits (known and unknown) before such individualized decisions are made.