Minimally invasive endoscopic sinus surgery could significantly improve the quality of life in adults with chronic rhinosinusitis, according to a new study by Oregon Health & Science University (OHSU) on 302 adults. Chronic rhinosinusitis is a debilitating inflammation of the nasal passages, characterized by chronic congestion, drainage, fatigue, headache, pain, pressure and sneezing, that lasts for months and keeps coming back.