LBA23 EPIK-P1: Retrospective chart review study of patients (pts) with PIK3CA-related Overgrowth Spectrum (PROS) who have received alpelisib (ALP) as part of a compassionate use programme

Guillaume Canaud, J.C. López Gutiérrez, Alan D. Irvine, Nii Ankrah, A. Papadimitriou, Antonia Ridolfi, Denise M. Adams