Retention Polyp More Condition_symptoms What Does Left Maxillary Sinus Polypoid Disease Mean?

What does Left Maxillary Sinus Polypoid Disease mean? - retention polyp more condition_symptoms

I am from just by a CT scan of what they say is:

It is a round structure of 2 cm polypoid floor of the left maxillary sinus. This is not specific, but could be a retention cyst mucus disadvantages polyps. Some of the ethmoid sinuses are opaque. Otherwise, the regions of the sinuses are normal. The vault is intact.

Who is able to shed light into this for me? I promise to quickly select the appropriate answer.