“…Upper airway (UAW) impairment such as recurrent rinorhinosinusitis, rhinitis and/or NP occurs in over 90% of patients. 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 The incidence of NP, in particular, has been reported in 6–48% patients, 17 , 18 and is symptomatic in about 4% patients at diagnosis of CF. 8 , 10 , 11 , 19 The literature estimates that 14% of patients require surgical treatment of NP.…”