Paediatricsmiddle twist
A 16-year-old girl attends with three months of worsening acne. There are deep tender lumps on both cheeks and along the jaw, two of them discharging, and four pitted scars have appeared on her cheeks since photographs taken in June. Her mother had the same problem and has heavy facial scarring. She has washed with benzoyl peroxide daily for six weeks with no change. Her periods are regular and she is not sexually active. Which one of the following is the most appropriate treatment step now?