Fig. 20
From: Fibrous dysplasia for radiologists: beyond ground glass bone matrix
Evaluation of hearing loss in craniofacial fibrous dysplasia (FD). a Extensive fibrous dysplasia (FD) involving petrous bones bilaterally; however, the internal auditory canals are patent (green arrows). T2 fat-saturated (b) and T1 contrast-enhanced (c) MRI demonstrate a large FD lesion centred in the left petrous temporal bone with near complete obliteration of left external auditory canal (blue arrow), which contributes to patient’s hearing loss (green arrow)