Osteoblastoma is a benign bone forming neoplasm most commonly occurring in the vertebrae, long bones, but the jaw involvement is very rare events. When localized close to the periapical region or laterally to the roots of the t eeth, the lesion is easily confused with inflammatory periapical pathosis. In this article, we report our experience with a case of osteoblastoma located in the periapical region that was initially misdiagnosed as an inflammatory periapical pathosis, which led to unnecessary dental treatment and a delayed diagnosis. This case demonstrates the importance of proper diagnosis and treatment planning when one is dealing with radiolucent lesions in the periapical area Therefore, this case stresses the importance of biopsy of periapical lesions that do not respond to endodontic treatment or are otherwise S USpl CIOUS.

• Jung Hoon Yoon(Department of Ora1 Patho1ogy, Chosun Universdy Schoo1 of Dentistry) | 윤정훈 Correspondence
• Sang Gun Ahn(Department of Ora1 Patho1ogy, Chosun Universdy Schoo1 of Dentistry) | 안상건 Correspondence