According to a 2013 American Academy of Pediatrics clinical practice guideline for the diagnosis and management of acute bacterial sinusitis, diagnosis of acute bacterial sinusitis should occur after a child has one of the following: 1) upper respiratory infection symptoms for 10 days without improvement, 2) a worsening course (usually with nasal discharge) after a period of prior improvement, or 3) the severe onset of fever—defined as ≥39º C for three days—with purulent nasal discharge.1 The diagnosis of sinusitis, though, requires the actual anatomical presence of a relevant sinus, too. What is the typical developmental progression of pediatric paranasal sinuses?
Dr. Landon Jones, Assistant Medical Director of Pediatric EM, discusses that development here. https://www.acepnow.com/article/know-when-the-paranasal-sinuses-typically-develop-in-kids/