This is a middle-aged man who reports being diagnosed HIV po…

This is a middle-aged man who reports being diagnosed HIV positive four years ago. The lateral border of his tongue presented as you see it here about four weeks ago. At that time, the dentist prescribed an oral suspension of Amphotericin B, which is an antifungal medication. The patient returned two weeks later for his cleaning appointment.  The lesion presented at this appointment without any change. Your most likely diagnosis based on clinical appearance and history would be: