Pattern of loco‐regional relapses and treatment in pediatric esthesioneuroblastoma: The French very rare tumors group ( Fracture ) contribution

BACKGROUND: Esthesioneuroblastoma (ENB) is a rare neuroectodermal tumor that seldom occurs during childhood. Multimodal treatments are currently proposed, but the place of each therapy is still in debate. Our objective is to describe clinical evolution, especially the pattern of relapses and determine contributors to tumor progression. PROCEDURE: Medical charts of all children (