11th August 2020

A 57-year-old man presents to the dermatology clinic with a slowly growing ulcer

A 57-year-old man presents to the dermatology clinic with a slowly growing ulcer on the left side of his nose over the past 9 months. On histological section, focal deposits of melanin are found within the basaloid epithelial layer of the epidermis. There is also an increased number of melanocytes with scattered macrophages in the stroma of the tumour.

For the patient above, please select the SINGLE most likely diagnosis. Select ONE option from the list above.