Aplastic anemia (AA) is a rare disorder in children, usually treated with immunosuppressive therapy (IST) including antithymocyte globulin (ATG) and cyclosporin A. There are no current widely used alternative therapies with comparable efficacy. We describe a child with severe aplastic anemia (SAA), who developed severe gingival hyperplasia secondary to cyclosporin A, unresponsive to intensive dental intervention. When IST was changed to tacrolimus there was a significant improvement in the gingival hyperplasia, but equally important, he achieved complete response of his AA within several months. The use of tacrolimus in children with AA may be a potential modality of treatment.
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