Yellow-Brown Plaque on the Foot

Yellow-Brown Plaque on the Foot

A 64-year-old Caucasian woman with a history of hypertension, rheumatoid arthritis and poorly controlled type II diabetes mellitus presents for evaluation of colour changes on her left foot.

She states that it began as a small papule on her foot that grew larger, with some areas of ulceration. On examination, there is a yellow-brown plaque on the dorsum of her left foot with mild erythema and telangiectasias.

What’s the Diagnosis?