Acral Plantar Melanoma Mimicking a Diabetic Foot Ulcer in a Nonagenarian: A Case Report

Acral melanoma on the plantar surface may be clinically overlooked and can resemble common causes of plantar ulceration. In patients with diabetes, chronic plantar lesions are often managed as diabetic foot ulcers, which can delay consideration of alternative diagnoses. We report the case of a very elderly woman with diabetes whose plantar lesion was initially treated as a diabetic foot ulcer but later evolved with features concerning for malignancy. Histopathology confirmed deeply invasive ulce