Fig. (4) Follow-up axial nonenhanced soft tissue window CT (a) of the head showing complete resolution of the soft tissue thickening and fluid collection in the left temporal bone region. Axial bone window CT (b) shows interval remineralization of the mastoid bone (arrowheads), including the area surrounding the semicircular canals and facial nerve canal (arrow). On the right, the fluid in the mastoid air cells has resolved and interval mineralization is noted.