Abstract
Ponatinib is a third-generation tyrosine kinase inhibitor used to treat chronic myeloid leukemia and Philadelphia-positive acute lymphoblastic leukemia. Cutaneous toxicities are a commonly reported side effect of ponatinib treatment with "rash" being one of the most common. Specific subtypes are infrequently reported, but include hyperkeratotic, folliculocentric, ichthyosiform, and pityriasis rubra pilaris-like eruptions. Herein, we highlight the clinicopathologic features of 2 cases of ponatinib-induced pityriasis rubra pilaris-like eruptions. We also classify the clinical and histopathologic features of all previously reported ponatinib-associated eruptions in the literature and discuss treatment and potential diagnostic pitfalls.
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