The nasal sinuses are air spaces surrounded by bone and lined with a mucous membrane. The sinuses create mucous which drains through small passages into the nasal cavity. Endoscopic sinus surgery is a minimally invasive procedure, where a small camera is placed in the nose to open the sinuses by making these small drainage pathways larger and wider. Dr. Chaboki removes polyps, thick mucus, and chronic infection. Endoscopic sinus surgery may involve only one sinus chamber or more. It may also be combined with septoplasty, turbinate reduction, or other nasal surgery. By opening the natural drainage passages, endoscopic sinus surgery may help alleviate sinus symptoms in appropriate patients.