Hello, Welcome to HealthcareMagic!
Your wife is probably suffering from chronic sinusitis
with DNS. Well there can be hyperplastic mucosa in sinuses
due to sinusitis also. Contrary to views expressed, an allergy
can only be avoided, not cured. Modern sinus surgeries
like FESS are safe & effective in expert hands. Please take second ENT opinion but go for surgery. Donot fear of a repeat surgery because any disease can occur again. so will you not treat due to this reason (ie. recurrence). Good luck.