Snapshot A 14-year-old boy presents with recurrent nasal congestion and left suborbital pain of 2 weeks duration. 1 week prior to the onset of these symptoms, he described having a "cold." On physical exam, there is pain over the left maxillary sinus. A CT of the head is shown.(Left maxillary sinusitis) Introduction Infection of the paranasal sinus due to undrained collection of pus login to view 2 more bullets Risk factors login to view 5 more bullets Acute sinusitis login to view 9 more bullets Chronic sinusitis login to view 4 more bullets Invasive Fungal Rhinosinusitis login to view 4 more bullets Noninvasive Fungal Rhinosinusitis login to view 2 more bullets Presentation Symptoms login to view 6 more bullets Physical exam login to view 1 more bullet Evaluation/Diagnosis Primarily a clinical diagnosis Imaging login to view 2 more bullets Nasal Endoscopy Invasive fungal rhinosinusitis login to view 1 more bullet Fungal Ball login to view 2 more bullets Allergic fungal rhinosinusitis login to view 1 more bullet Treatment Acute sinusitis login to view 5 more bullets Chronic sinusitis login to view 4 more bullets Invasive fungal rhinosinusitis login to view 2 more bullets Fungus ball login to view 1 more bullet Allergic fungal rhinosinusitis login to view 2 more bullets Complications osteomyellitis mucocele meningitis epidural abcess cerebral abscess orbital/periorbital cellulitis cavernous sinus thrombosis Prognosis Generally good in acute bacterial sinusitis can be fatal in diabetic or immunocompromised patients with invasive fungal disease