Review Question - QID 210955

A 61-year-old farmer presents to his primary care physician for a checkup. He has not seen a physician in over 10 years but states that he has been in good health and has remained very physically active over this time period. The patient has a past medical history of a seizure disorder for which he was prescribed phenytoin, as well as a past medical history of diabetes mellitus which is not currently being treated. His temperature is 98.7°F (37.1°C), blood pressure is 120/75 mmHg, pulse is 90/min, respirations are 12/min, and oxygen saturation is 98% on room air. On physical exam you note an older man who is in no distress. On dermatologic exam you note the findings in Figure A. If a biopsy of this patient's skin finding is performed, which of the following is the most likely finding to be seen?