SAGE Publications, SAGE Open Medical Case Reports, (6), p. 2050313X1879507, 2018
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Bosutinib is a BCR-ABL tyrosine kinase inhibitor approved for the treatment of Philadelphia chromosome–positive chronic myelogenous leukemia. We report a case of bosutinib-induced interstitial granulomatous drug reaction in a 50-year-old Caucasian female with chronic myelogenous leukemia. Histologic analysis of a punch biopsy showed diffuse interstitial granulomatous infiltrates consisting of histiocytes amid thickened collagen accompanied by eosinophils. Her lesions improved with clobetasol 0.05% cream. No cases describing BCR-ABL tyrosine kinase inhibitor–associated interstitial granulomatous drug reaction were found in a search of the literature. It is important for physicians to be aware of the risk of interstitial granulomatous drug reaction associated with bosutinib treatment.