Figure Legends
Fig. 1. Surgery of patient ID2 (right ear). Extensive ossification was observed over the lateral semicircular canal. Triangle: Extensive ossification over the lateral semicircular canal. M: indicates the head of the malleus. Arrows indicate the fistula of the lateral semicircular canal. *: indicates the Cholesteatoma tissue.
Fig. 2. Preoperative imaging data of the patients. Arrows indicate the extensive ossification over the lateral semicircular canal.