My father is 69 year old, non diabetic currently under treatment for enlargement of prostrate (taking dutasteride+ Alfuzosin combination since last four years). Now it enlargement is abt 24g. He is also hypertensive (taking Atenolol). He was sufferring from chronic sinusities. as per his CT scan report, he is having soft tissue formation (WITH BONE EROSION) in Maxillary sinus, along with running nose, thickening of cough. ENT specialist suggests to opt for surgery (FESS). I would like to know that the cost of the surgery in India (planning to shift him CMC vellore, India) and the severity of the disease. Is it completely curable after the surgery? and what are the future risk for the same? How urgent I should go for this surgery?