A 57-year-old on chemotherapy for colon cancer develops darkening palms. Explore the Differential Diagnosis for this striking dermatologic finding.
A 57-year-old man with stage 3b colon cancer on adjuvant chemotherapy noticed progressive darkening of his palms that was not associated with redness, scaling, or pain. The plantar aspects of his feet were minimally affected but the remainder of his skin was normal. What is the diagnosis?
What is the most likely diagnosis?
Chemotherapy, Colon Cancer, Dermatology, Fluorouracil side effect, Hyperpigmentation
