1. From the Department of Otolaryngology, King Fahad National Guard Hospital, Riyadh, Saudi Arabia.
2. Address reprint requests and correspondence to Dr S. A. Kamal: Consultant Otolaryngologist & Head of the Division, King Fahad National Guard Hospital, P. O. Box 22490, Riyadh 11426, Saudi Arabia.
3. From the Department of Radiology, King Fahad National Guard Hospital, Riyadh, Saudi Arabia.