How Can An Enlarged Adenoids Cyst, Chronic Sinusitis And Allergies Be Treated?

Hello, had a visit with my ENT discovered that my adenoids are enlarged, he gave me prednisone, patanese and another nasal cortisone to take along with loratidine. my adenoids have went from a size 2 to 3 he says I have a cyst on my adenoid and gave me a script for a cat scan. I am very nervous what causes cysts to develop on adenoids and what is the treatment for this. I have been diagnosed with chronic sinusitis and severe allergies.