Observation highlights benign effects of osimertinib on skin and distinguishes similar conditions.
Osimertinib-induced erythema dyschromicum perstans is a benign but striking phenomenon, that does not require cessation of causative drug. Its clinical mimics include lichen planus pigmentosus, pigmented contact dermatitis and fixed drug eruption. Clinicopathological correlation can distinguish these differentials.
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Long et al. (2025) studied this question.
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