MSFinals-1852
An 83-year-old woman visits her general practitioner complaining of a labial lump that has been present for two weeks. Although she does not experience any pain, she reports that the lump is very itchy and rubs against her underwear. The patient has a medical history of hypertension and type 2 diabetes mellitus, and she takes amlodipine, metformin, and sitagliptin daily. During the examination, the physician observes a firm 2 cm x 3 cm lump on the left labia majora. The surrounding skin appears normal without signs of erythema or induration. Additionally, the physician notes palpable inguinal lymphadenopathy. What is the most probable diagnosis?