A 12-year-old girl with pharyngitis, meningitis and sinovenous thrombosis.

A previously healthy 12-year-old girl presented to her family doctor with a 4-day history of sore throat, fever and vomiting, preceded by an apparent cold sore on her right upper lip. Bacterial pharyngitis was diagnosed, and amoxicillin–clavulanate was prescribed, but the patient discontinued the