1 Evaluation of impact of steroid replacement treatment on bone health in children with 21- hydroxylase deficiency M. Delvecchio 1 , L. Soldano 1 , A. Lonero 1 , A. Ventura 1 , P. Giordano 1 , L. Cavallo 1 , M. Grano 2 , G. Brunetti 2 , M.F. Faienza 1 1 Department of Biomedical Sciences and Human Oncology, Pediatrics Unit, University of Bari ‘A. Moro’, Bari, Italy; 2 Department of Basic Medical Sciences, Neuroscience and Sense Organs, Section of Human Anatomy and Histology, University of Bari ‘A. Moro’, Bari , Italy. Corresponding author Maria Felicia Faienza, MD Department of Biomedical Sciences and Human Oncology, Pediatrics Unit, University of Bari “A. Moro”, Bari, Italy Piazza G. Cesare,11 70124, Bari, Italy Phone: +39805593075 Fax: +39805592287 e-mail: mariafelicia.faienza@uniba.it Key words: congenital adrenal hyperplasia, 21-hydroxilase deficiency, bone health, glucocorticoids, quantitative ultrasonometry