What does FESS stand for?

• A. Functional Endoscopy Sinus Surgery
• B. Frontal Endoscopic Sinus Surgery
• C. Functional Endoscopic Sinus Surgery
• D. Functional Ekoscopic Sinus Surgery

Answer: (C)

FESS stands for Functional Endoscopic Sinus Surgery. This naming reflects a minimally invasive approach that uses an endoscope to access the sinus routes and aims to restore normal sinus drainage and ventilation, not just to remove tissue. The term emphasizes both the technique (endoscopic) and the goal (functional restoration of sinus physiology).

Why this is the best fit: using “Endoscopic” correctly describes the method of visualization and access, and “Functional” underscores restoring how the sinus drains and vents, which is the core purpose of this surgery.

Why the other phrases don’t fit: using “Endoscopy” instead of “Endoscopic” changes the grammatical form and is not the standard acronym. Limiting it to the frontal sinus would misrepresent the scope, since FESS addresses multiple sinus areas. A misspelled term (Ekoscopic) is simply not correct.