A 60-year-old man presents with localized tender plaques of hyperkeratosis and a surrounding erythematous halo on the weight-bearing plantar aspect of his feet after beginning cancer treatment. Which medication is responsible for this cutaneous presentation and what is the name of this reaction?
A 60-year-old man presents with localized tender plaques of hyperkeratosis and a surrounding erythematous halo on the weight-bearing plantar aspect of his feet after beginning cancer treatment.
What is your diagnosis?