Review Question - QID 216234

A 8-year-old male presents to the clinic for evaluation of a scalp lesion. For the last 6 weeks, he has developed a focal tender scalp lesion that is associated with surrounding hair loss, occasional drainage, and pruritus. His mother attempted to treat the area with topical emollients and over-the-counter hydrocortisone cream, however, there has been no improvement . She does not recall any exposures over the last several months. His medical history is significant for a streptococcal pharyngitis a year ago. His blood pressure is 102/65 mmHg, pulse 85/min, respirations 14/min, and temperature 98.0°F (36.6°C). Physical exam reveals cervical lymphadenopathy and the findings seen in Figure A. Which of the following is the most appropriate treatment?