Radiological case of the month. Monostotic fibrous dysplasia of the temporal bone

Y. P. Talmi, J. B. Ziv, R. Shimberg, Y. Finkelstein, Y. Zohar and B. P. Wood
Department of Otolaryngology, Hasharon Hospital, Golda Medical Center, Petah Tikvah, Israel.

Computed tomographic scan demonstrating narrowing of the left external auditory canal caused by an expansile bone lesion of the temporal bone (curved arrow). The regional bone was characterized by a "ground-glass" appearance. A small cholesteatoma is located between the tympanic membrane and the bony lesion (black arrow).