Fig. 1

CT imaging findings. a Axial non-contrast CT image shows a 31 × 43 × 46-mm mass in the left maxillary sinus and masticatory space with resorption and destruction of the maxillary sinus posterior bone. b Coronal CT (bone-window) images show diffuse and partial resorption of the alveolar bone and elevation of the posterior maxillary sinus floor with destruction of the floor and lateral side wall