Nasal endoscopy of the accessory nasal cavity revealed that it was small and did not communicate with the ipsilateral normal nasal cavity, a finding that was later confirmed by sinography
. No anomalies were seen in the normal nasal cavities.
Following sinography through the catheters, which at fluoroscopy showed no communication, 50 cc of alcohol (95% sterile ethanol) was injected and left in the cyst for approximately 40 minutes and then removed.
If a large volume of alcohol is used, a minimal risk of alcohol intoxication is present; other side effects include transient low-grade fever, hemorrhage into the cyst, and abdominal pain. Communication of the cyst with the peritoneum or biliary tree is a contraindication to alcohol sclerotherapy, so catheter sinography under fluoroscopy is done at the time of aspiration and prior to sclerotherapy.