The Draf III (modified Lothrop) procedure is performed to create a maximal drainage opening in which sinus?
- A Frontal sinus ✓
- B Maxillary sinus
- C Sphenoid sinus
- D Ethmoid sinus
Correct answer: A. Frontal sinus
Explanation
The Draf III (endoscopic modified Lothrop procedure) creates a large combined drainage pathway for both frontal sinuses by removing the floor of both frontal sinuses, the upper nasal septum between the sinuses, and the interfrontal sinus septum. It is reserved for difficult frontal sinus disease, revision surgery, frontal osteoma, or frontal sinus cerebrospinal fluid leaks where standard Draf I or II drainage is insufficient. It is the most extensive endoscopic approach to the frontal sinus.
Reference: Dhingra Diseases of Ear, Nose and Throat, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.