Before I considered surgery (an irreversible process), I would investigate more benign (and possibly more effective) options.
If you haven't already, you might want to eliminate all sinus/respiratory-irritants in your environment, including your diet.
For example, many people consume a daily diet containing foods to which they are mildly allergic, such as dairy, wheat or other forms of gluten, corn, etc. By "mildly," I mean there are no obvious signs of allergy -- such as sneezing or throat closing. It's more of a general drag on the immune system.
Dr. Charles Parker writes extensively on gluten sensitivity at his blog:
http://www.corepsychblog.com/2007/08/why-we-overlook-celiac-and-gluten-sensitivity/
One pathogen that tends to like the sinus cavity is Aspergillus Niger. You might be exposed to this mold via damp areas or wood in your home or garden as well as certain foods such as grapes and strawberries.
Here is more information Aspergillus and it's deleterious effects on the respiratory system, sinuses, etc.
http://www.merck.com/mmhe/sec17/ch197/ch197b.html
I hope you feel better soon.
Thanks again. This is the best answer I have received to my question.
Sincerely,