Case Presentation: A 7 year-old with hypohidrotic ectodermal dysplasia (ED) and recurrent sinusitis was admitted with diplopia, headaches, and fevers. In the preceding 2 months, he had multiple episodes of fever, nasal impetigo, and positive group A strep (GAS) throat swabs without pharyngitis. He was treated twice with azithromycin due to allergies to amoxicillin, cephalosporins, […]