P1058: CHILDHOOD-ONSET ERDHEIM-CHESTER DISEASE IN THE MOLECULAR ERA: CLINICAL PHENOTYPE AND LONG-TERM OUTCOME OF 21 PATIENTS - Francesco Pegoraro; Martina Mazzariol; Irene Trambusti; Saamer Bakhshi; Saumyaranjan Mallick; Ira J. Dunkel; Van den Bos Cor; Ozlem Tezol; Shijun Shan; Suheyla Ocak; Flavio Giordano; Carmen De Fusco; et al. (HemaSphere, 2023)