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Continue to ChatBalloon Dilation: a treatment in chronic sinusitis. Chronic sinusitis is a common condition where the cavities around the nasal passages (sinuses) become inflamed and swollen lasting for at least 12 weeks, despite treatment attempts. https://www.theportugalnews.com/hi/hi-news/2021-04-30/balloon-dilation-a-treatment-in-chronic-sinusitis/59617