• Mariane Rix, Niels Holtum Birkebaek, Steen Rosthøj, and Niels Clausen.
• Department of Pediatrics, Aalborg University Hospital, Aalborg, Denmark.
• J. Pediatr. 2005 Nov 1; 147 (5): 645-50.

ObjectivesTo investigate how frequently adrenal function fails to recover after corticosteroid therapy in children with acute lymphoblastic leukemia and to explore the clinical impact of slow adrenal recovery without steroid substitution.Study DesignLow-dose (1 microg) adrenocorticotropic hormone tests were performed before and after steroid courses and during infectious episodes in 24 children. Test results were not available during the study.ResultsAll 13 patients tested before treatment had normal adrenal responses. Adrenal suppression was found in 8 (47%) of 17 patients 5 days after discontinuation of a 5-week induction course of prednisolone and in 1 (20%) of 5 patients 7 days after a 3-week intensification course of dexamethasone, both courses being tapered over 9 days, as well as in all 13 patients tested 2 days after a 1-week prednisolone course. Clinically significant manifestations of adrenal suppression were noted in 3 (12%) patients. Of 204 scheduled tests, 131 were performed.ConclusionsHigh-dose glucocorticoid therapy may cause adrenal suppression lasting more than 1 week in children with acute lymphoblastic leukemia, even after tapering the dose. We suggest steroid replacement during stress episodes within 1 to 2 weeks after discontinuation and thereafter testing adrenal function selectively in accordance with symptoms.

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