Letter to the Editor concerning "Risk of revision surgery for adult idiopathic scoliosis: a survival analysis of 517 cases over 25 years" by G. Riouallon et al. (Eur Spine J; 2016;25(8):2527-2534). - Sánchez-Mariscal, Felisa; Gomez-Rice, Alejandro; Izquierdo, Enrique; Pizones, Javier; Zúñiga, Lorenzo; Álvarez-Gonzalez, Patricia (European Spine Journal, 2017)