유양동에 발생한 거대 콜레스테롤 육아종성 낭종 치험 1례

Abstract

Cholesterol granuloma is a rare lesion of the temporal bone and must be distinguished from epidermoid, cholesteatoma and other mass lesion of the temporal bone. We report a case of a 34-year-old female who presented to our institution with left temporal headache with bloody otorrhea. Bony destructive lesion of posterior cranial fossa was shown in computed tomography. The cystic mass was found and completely excised by transmastoid approach. At operation, cystic fluid was found in the lesion and sent to laboratory for cytologic evaluation. The fluid was remarkable for numerous inflammatory cells, blood breakdown products, multinucleated giant cells and cholesterol crystals and squamous epithelial cells, fibrous connective tissue and glandular tissue was present. Postoperative condition of the patient was good and discharged in postoperative 9 days without any complications. The patients has been receiving treatment for the last 5 months on an out patient basis without recurrence. The authors report a case of cholesterol granuloma cyst which was developed on mastoid the first time without any previous history of surgery. The differential diagnosis and radiologic evaluation are discussed.