Review Question - QID 213356

A 16-year-old boy is brought to the clinic for a sore throat and fever. He began feeling a dull, 5/10 pain in his throat 2 days ago and had a documented fever today of 101.4°F (38.5°C). He also endorses fatigue and headache, but denies chills, cough, congestion, rhinorrhea, chest pain, ear pain, ulcerations, or gastrointestinal symptoms. He just returned from a hiking trip in the Rocky Mountains 1 week ago and reports taking some old antibiotics he had received for an ear infection when he began feeling sick. A physical examination demonstrates enlarged posterior cervical lymph nodes and a rash on the torso shown in Figure A. Which of the following findings would you expect in this patient?