Sinus surgery (endoscopic sinus surgery – FESS) is a widely used and highly successful method in the treatment of chronic sinusitis, nasal polyps, and certain sinus conditions (masses, tumors). Sinuses are not removed during sinus surgery. The modern approach known as endoscopic sinus surgery (FESS) is a functional procedure aimed not at removing the sinuses, but at opening their blocked natural passages to restore normal function. In chronic sinusitis, the problem is not the sinuses themselves but the narrowing or blockage of their openings into the nose. During surgery, these passages are widened and, if necessary, polyps, inflamed, or diseased tissue inside the sinus is cleared. However, the sinus cavities are preserved and left in place. In short, sinus surgery is a conservative procedure that aims not to remove the sinuses, but to restore their natural function by reestablishing ventilation and drainage.
The sinuses are among the most anatomically variable regions of the human body.
This means every patient’s sinus structure can differ significantly. For this reason, when planning sinus surgery, the most critical factor is not technology alone, but thorough mastery of sinus anatomy and accurate assessment.
Sinuses Are Not the Same in Everyone
The paranasal sinuses consist of the frontal (forehead), ethmoid (roof of the nose), maxillary (cheek), and sphenoid (skull base) sinuses. However, their:
- Size
- Location
- Level of the entry points
- Internal structure
can vary considerably from person to person. This is why the sinus CT scan performed before surgery is one of the most important stages of the procedure.
For example:
- The opening of the maxillary sinus may be smaller and positioned lower than normal in some patients.
- The ethmoid sinuses may consist of a small number of large chambers or a large number of small cells.
- The entry points of the frontal and sphenoid sinuses may be narrow, wide, or sometimes entirely undeveloped.
These anatomical differences can make navigation during surgery more challenging. This is why the most important answer to the question what is FESS? is: this is a surgery that must be planned individually for each patient.
The Sinuses Are Very Close to Vital Organs
The sinuses are surrounded by highly sensitive and critical structures:
- The eye and eye muscles
- The optic nerve
- The brain and skull base
- Major blood vessels
If sinus anatomy is not well understood, rare but serious sinus surgery risks may arise, such as:
- Eye injury
- Vision problems
- Cerebrospinal fluid leakage
- Major vascular injuries
For this reason, the most important principle of sinus surgery is:
Know the anatomy first, then begin the operation.
Additional Chambers May Be Present Inside the Sinuses
In some patients, the sinuses may contain:
- Accessory cells
- Hidden chambers
- Unexpectedly narrow passages
If these structures go unnoticed:
- Some diseased tissue may be left behind
- Sinus openings may not be fully cleared
- Postoperative complaints may persist
This is why the surgeon must carefully assess all anatomical details, particularly in cases of nasal polyp surgery and advanced chronic sinusitis.
Conditions That Impair Visibility During Surgery
Visibility quality is critically important in endoscopic sinus surgery. However, certain conditions can make the procedure more challenging:
- Widespread nasal polyps
- Bleeding tissues
- Inflamed and swollen mucosa
- Long-standing infections
In chronic infections, bones may thicken and harden, making it more difficult to open the sinus passages.
In such cases, the surgery is made safer through the use of:
- Microsurgical instruments
- Microdebrider (shaver) systems
- Advanced bleeding control techniques
Why Is the Navigation System Important?
The sinus navigation system offers significant advantages particularly for:
- Patients with complex anatomy
- Patients who have undergone previous surgery
- Frontal and sphenoid sinus surgeries
With navigation, the surgeon can monitor the real-time position of the instrument inside the sinus on the CT image. This technology enhances safety when approaching critical areas and helps ensure no disease is left untreated.
For this reason, navigation-assisted endoscopic sinus surgery has become an important safety tool in advanced cases.
Technology Is an Aid, But Experience Is What Matters Most
Advanced cameras, precision instruments, and navigation systems all facilitate sinus surgery. However, the foundation of a successful operation rests on:
- Detailed sinus CT analysis
- Mastery of sinus anatomy
- Recognition of anatomical variations
- Surgical experience
Is sinus surgery a difficult operation?
Endoscopic sinus surgery (FESS) is a safe and controlled procedure in experienced hands. However, because sinus anatomy varies from patient to patient, surgical planning and anatomical expertise are of great importance.
What is FESS?
FESS (Functional Endoscopic Sinus Surgery) is a modern sinus surgery technique performed through the nose using a camera, requiring no external incisions. It is used to treat chronic sinusitis, nasal polyps, and certain sinus conditions.
When Is Sinus Surgery Necessary?
- Chronic sinusitis that has persisted for a long time
- Complaints that continue despite medical treatment
- Nasal polyps
- A mass or fungal infection inside a sinus
- Recurrent sinus infections
Frequently Asked Questions
1 – Is sinus surgery risky?
Because the sinuses are close to the eyes, brain, and major blood vessels, surgery requires careful attention. However, with thorough sinus CT evaluation, anatomical planning, and an experienced surgeon, the risk of complications is very low.
2 – Why is a sinus CT scan necessary?
A sinus CT scan provides a detailed view of each patient’s unique sinus anatomy. It is the most important step in surgical planning to ensure the operation is performed safely and completely.
3 – What does the navigation system do?
The sinus navigation system shows the real-time position of surgical instruments inside the sinus on the CT scan during the operation. It enhances safety particularly in complex anatomy and revision surgeries.
4 – Can sinusitis recur after sinus surgery?
With the correct surgical technique and appropriate patient selection, the success rate is high. However, factors such as allergies, smoking, or structural issues may cause the condition to recur in some patients.
5 – Is nasal polyp surgery the same as sinus surgery?
Nasal polyps are usually seen together with chronic sinusitis, and their treatment is most often performed through endoscopic sinus surgery (FESS).
6 – Is sinus surgery safe?
With an experienced surgeon, proper planning, and modern technology, sinus surgery is a safe and effective treatment method today.
In summary:
The most important factor in sinus surgery is the surgeon’s thorough knowledge of anatomy.
Conclusion: Is Sinus Surgery Safe?
When properly planned and performed by experienced hands, sinus surgery is a safe and effective treatment. However, since every patient’s sinus structure is different, surgery must always be planned on an individual basis.
If you have long-standing complaints such as chronic sinusitis, recurrent infections, nasal polyps, or persistent facial pain, a thorough evaluation and proper surgical planning are the most important steps in determining the success of treatment.
Correct planning + correct anatomical knowledge = safe and successful sinus surgery.
