2017 Volume 51 Issue 1 Pages 17-22
We retrospectively studied 68 primary cases of keratocystic odontogenic tumor (KCOT) treated in the First Department of Oral and Maxillofacial Surgery, Osaka Dental University between January 1997 and December 2011. KCOT cases were pathologically diagnosed according to the guidelines of the 2005 WHO histological classification of odontogenic tumors. There were 39 (57%) male and 29 (43%) female patients between 11 and 80 years of age with a mean age of 43 years. The KCOT was in the mandible in 56 (82%) of the pa tients, and in the maxilla in 12 (18%). The most common site was from the mandibular molar to the mandibular ramus (59%). The modalities used for the initial treatment of KCOTs were enucleation with curettage in 27 patients, marsupialization in 21, enucleation in 19, and marginal resection of the mandible in 1. KCOT cases treated with marsupialization underwent enucleation with cu rettage (16), enucleation (4) or marsupialization (1) after the initial treatment. Tumor re currence was observed in 9 patients between 1.8 to 11 years after the operation. The sites of recurrence were in close proximity to the adjacent tooth in 5 patients, and near the mandibular canal in 4. (J Osaka Dent Univ 2017 ;51 : 1722)
