Tehran University of Medical Sciences Journal of Craniomaxillofacial Research 2345-5489 10 3 2023 12 09 127 131 Ali Sadeghian School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Anita Taheri School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Pedram Bakhshaei Department of Oral & Maxillofacial Surgeon, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran. 2023 09 23 2023 09 30 Dentigerous cyst is one of the most common odontogenic cysts of the jaw that slowly grows around an unerupted tooth crown. Nasopalatine duct cyst is a non-odontogenic common jaw cyst. Co-occurrence of nasopalatine duct cyst and dentigerous cyst in the same location of the same jaw is extremely rare. Odontogenic and non-odontogenic cysts occurring simultaneously in non-syndromic patients is rare. The lesions must be fully extracted by surgery. We report the treatment procedure of a patient suffering from this rare phenomenon. Keywords: Odontogenic cyst; Nonodontogenic cyst; Impacted tooth. https://jcr.tums.ac.ir/index.php/jcr/article/view/460 https://jcr.tums.ac.ir/index.php/jcr/article/download/460/387