A 51-year-old Hispanic man presents for evaluation of a lesion he was born with. It grew as he did and was never more than a cosmetic problem until recently, when it became enlarged and sensitive. His family members convinced him to have it evaluated by primary care, who referred him to dermatology.
The patient denies any health problems other than type 2 diabetes, which is adequately controlled. His dark skin almost always tans, rather than burns, with sun exposure.
The lesion is hard to miss, measuring 1.8 cm x 5.5 mm and located prominently in the upper left nasolabial fold. It is quite firm, brownish red, hair-bearing, and round, with fine mammilations on the surface. It sits on a base only slightly smaller than the lesion’s surface. The rest of the patient’s skin is unremarkable.
Given that the lesion has changed and is quite sizeable, it is excised with a curving elliptiform incision along relaxed skin tension lines, paralleling the nasolabial fold, and sent for pathologic examination.
What is the diagnosis?