Setliff Sinus Institute A Leader In Sinus Care For Over 20 Years


Sinus Anatomy and Structure

Sinus anatomy and drainage

Nasal Polyps


Sinus Anatomy/StrUctures

Deviated Nasal Septum

  • An abnormality in the nose in which the partition, the nasal septum, separating the left and right sides of the nose curves or twists. Nasal obstruction, poor sleep, facial pain and/or sinus infections can result.


  • Bones on the sidewall of the nose. There are three turbinates on each side of the nose: the lower (or inferior) turbinate, the middle turbinate and the upper (or superior) turbinate. The tear duct drains underneath the lower turbinate. The maxillary, anterior ethmoid and frontal sinuses drain beneath the middle turbinate, and the posterior ethmoid sinuses drain under the upper turbinate.


  • Air-filled cavities located above, between and behind the nose and connected to the nose by tiny passages that carry mucous from the sinus into the nose and also keep the air constant in the sinuses.
  • Ethmoids

    • Sinuses located between the eyes.

  • Sphenoids

    • Sinuses located behind the eyes; the most deeply placed sinuses.

  • Frontals

    • Sinuses located in the forehead.

  • Maxillary

    • Sinuses located below the eyes.


  • The tissue that's just beyond the back end of the nose, up behind the soft palate.  Large adenoids can lead to blockage of the nose and may contribute to sinus infections.


  • A small opening connecting the sinuses to the nose.


  • A mass of membrane not typical to normal anatomy.

Sinus Complaints

Sinus Infections and Sinusitis

  • An inflammation of the lining in one or more of the sinuses, characterized by excessive mucous, congestion and other complaints.

Sinus Headaches

  • Headaches characterized by a painful pressure in certain areas of the face or skull and typically triggered by air pressure changes, pressure points or blocked sinuses.


  • Dysfunctional immune responses to substances harmless to most people.
  • Any substance that induces an allergy. Common allergens are house dust mite, pollen, mold and animal dander.


  • A chronic lower respiratory condition caused by a tightening of the muscles and swelling of the lining in the small breathing tubes of the lungs.

Sinusitis & Sinus Complaints
Dr. Setliff performing sinus surgery with the Hummer


Clinical/Surgical Terminology

CT Scan

  • A type of X-ray that provides a detail blueprint of the architecture of the nose and sinuses.

Nasal Endoscopy/Endoscope   

  • A procedure in which the physician uses an endoscope to survey the nasal passages, looking for how much space is available for air passage, any obstructions, infection, polyps, signs of allergy, or other swelling.

Minimally Invasive

  • Techniques that case less trauma for the patient and disturb as little of the anatomy as possible.

Setliff Sinus Institute is not your ordinary sinus clinic. Because we are the most highly specialized sinus clinic in the region, focused SOLELY on sinus care