● Acute sinusitis: symptoms for < 4 weeks duration ● Chronic sinusitis: symptoms for > 12 consecutive weeks ● The disease is subacute when symptomatic for 4-12 weeks
PANCE Blueprint EENT => Nose and Sinus Disorders => Acute and chronic sinusitis (https://smartypance.com/lessons/nose-sinus-disorders/acute-chronic-sinusitis-reeldx300/)