Key Difference – Sinusitis vs Rhinosinusitis The inflammation of the paranasal sinuses is known as sinusitis. Sinusitis rarely occurs without a preceding episode of rhinitis. Because of this concurrence and the interrelationship between sinusitis and rhinitis, nowadays clinicians refer to sinusitis as rhinosinusitis. Therefore, the difference between sinusitis and rhinosinusitis is that sinuses are […]