Chronic Cribriform Ulcerated Plaque on the Left Calf

A 61-year-old man presented to the dermatology clinic for evaluation of a painless nonhealing wound on the left calf of 4 years' duration.The patient had a history of amputation of the right foot as an infant, for which he wore an orthopedic prosthesis.He also had chronic lymphedema of the left leg, hyperlipidemia, and osteoarthritis of the right hip.There was no history of gastrointestinal tract issues.The lesion initially was small, then grew and began to ulcerate and bleed.His presentation to dermatology was delayed due to office closures during the COVID-19 pandemic.Physical examination revealed a 5-cm, erythematous, cribriform ulcer with a violaceous undermined rim.A punch biopsy was performed on the edge of the ulcer. WHAT'S YOUR DIAGNOSIS?a. Buruli ulcer b. nodular basal cell carcinoma c.