Keratocyst odonogenic tumor in the anterior of the maxilla: A case report and literature review

Keratocyst odonogenic tumor (Kcot) is one of the most prevalent lesions in the oral cavity recently named as a tumor due to its aggressive behavior and growth pattern, which is seen in the mandibular jaw especially in the posterior regions. One of the most important characteristics of this tumor is wide extension in the lack of distinctive clinical expansion. However, some rare Kcot cases with unusual location and clinical behavior have been reported. The present article that is a case of Kcot with distinctive expansion in the anterior region of maxilla among them. A 26-year-old female with a chief complaint of swelling in the right side of maxilla initiated from 1 year ago was referred to the clinic. Clinical examinations revealed a fluctuant swelling without any tenderness in the apical region of teeth number 12, 13 and 14. A well-defined uni-cystic radiolucency with sclerotic borders from the distal of the tooth number16 to the distal of the tooth number 22 resulted in root displacement of teeth 12 and 13 was seen in panoramic radiography and computed tomography scan. Superior displacement of the inferior border of the right maxillary sinus and the nasal cavity floor was also seen. Finally, with performing excisional biopsy, histopathological diagnosis was as Kcot. Due to the different clinical and radiographic manifestations of Kcot, it is necessary to complete evaluation of cyst-like lesions in unusual locations with uncommon clinical characteristics.