Aneurysmal bone cyst in the middle turbinate: a case report.

Aneurysmal bone cyst is a benign and locally destructive bone lesion usually seen in the younger population. Its etiology is unknown. Its yearly incidence rate has been reported to be 0.14/100,000, comprising 1% of all bone tumors. It may develop primarily or arise from primary bone tumors. Hemorrhagic fluid content with a septated appearance is the characteristic feature of aneurysmal bone cyst. It is most commonly seen in the metaphysis of the long bones. In rare cases, the cyst is located in the skull. Primary treatment is surgical excision, and the recurrence rate after treatment is 10 to 30%. Based on a review of the current literature, there have been no previous reports of aneurysmal bone cyst located in the middle turbinate. We report a case of aneurysmal bone cyst with an atypical location and discuss the treatment of the patient with endoscopic surgery in light of relevant literature.