Rhinosinusitis is an inflammation of the paranasal sinuses and the nasal cavity lasting no longer than 4 weeks. It can range from acute viral rhinitis (the common cold) to acute bacterial rhinosinusitis. Fewer than 5 in 1,000 colds are followed by bacterial rhinosinusitis.
Some 37 million Americans suffer from sinusitis; some of those patients are unfortunate enough to also have asthma, an inflammatory disease of the lungs characterized by reversible airway obstruction.
Researchers have recently claimed that eosinophilic chronic sinusitis is an immune disorder caused by the body’s reaction to fungus.