Forty percent of patients with chronic rhinosinusitis (CRS) also have asthma, which places them in the subgroup of CRS patients resistant to all types of therapy. Functional endoscopic sinus surgery (FESS) has markedly improved as a treatment for CRS, but its effect on asthma is unclear. Sun Yat-Sen University conducted a study where it evaluated the long-term effect of FESS-oriented multimodal treatment for this subgroup.

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