CT
The left maxillary alveolar process shows a large well-defined expansile unilocular cyst, protruding into and occupying most of the left maxillary sinus, mildly expanding it. It is reaching and obliterating the left osteomeatal complex.
An unerupted tooth is seen related to its anterior aspect.
The lesion is associated with bony remodeling, cortical thinning and bony resorption of the left buccal cortex with mild surrounding fat stranding.