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Abstract
Topical pimecrolimus is an alternative treatment of atopic dermatitis. However, rare cases of malignancy have been reported with their use. This study was performed to investigate the possible geno- or cytotoxic effect in mouse bone marrow caused by systemic absorption of pimecrolimus 1% cream. In order to determine this, induction of micronucleated erythrocytes (MNE) in mouse peripheral blood was determined after the cutaneous application of three different doses, daily for 5 consecutive days. No differences were found in frequencies of polychromatic erythrocytes, MNE, and micronucleated polychromatic erythrocytes in the different groups of study. In conclusion, under described conditions, no geno- or cytotoxic effects were detected after the cutaneous application of pimecrolimus.