Keratocystic Odontogenic Tumor (Odontogenic Keratocyst): Preliminary Retrospective Review of Epidemiologic, Clinical, and Radiologic Features of 261 Lesions From University of Turin

Purpose: To analyze and discuss the demographic, clinical, and surgical aspects of 261 surgically treated keratocystic odontogenic tumors. Patients and Methods: A retrospective review was performed of all cases of treated keratocystic odontogenic tumors. Statistical analysis was used to search for associations among age, presenting symptoms, location, dimension, and locularity. Results: Keratocystic odontogenic tumors most commonly occurred in patients in the third and fourth decades of life. The ratio of males to females was 2:1. The mandibular angle region was the most frequently involved site. Significant associations were found between multilocular lesions and lesions larger than 31 mm (P < .00000005), a mandibular site and larger lesions (P < .05), patients younger than 41 years old and multilocular lesions (P < .05), and younger patients and larger lesions (P < .00005). Conclusion: It is likely that most multilocular, larger (and probably aggressive) lesions are found in patients younger than 41 years of age. (C) 2010 American Association of Oral and Maxillofacial Surgeons J Oral Maxillofac Surg 68:2994-2999, 2010