A 26-year-old male patient presented with pain in the region of the posterior right maxilla. Clinical examination revealed a swelling in the region of the upper right third molar shrouded by a large yellowish-brown hard mass resembling dentin and a secretion draining tract. Investigations: Panoramic radiographs reconstructed of CBCT: An irregular radiopaque mass surrounded by a distinct radiolucent rim associated with the upper right third molar, which was dislocated into the maxillary sinus. CBCT: A 3.2 × 2.3 × 2.2 cm hyperdense mass interspersed with areas of hypodensity.

The lesion extended superiorly from the alveolar ridge to the middle third of the right maxillary sinus, displacing the upper right third molar to the top. Lateral extension of the lesion toward the infratemporal fossa and a slight displacement of the medial wall of the right maxillary sinus. Thickening of the soft…