title: Radiology quiz case 2. Bilateral petrous apex cephaloceles (PACs).
authors.affiliation: University of Michigan Health System, Ann Arbor, MI, USA.
authors.forename: Ashok
authors.initials: A
authors.lastname: Srinivasan
authors.forename: Mohannad
authors.initials: M
authors.lastname: Ibrahim
authors.forename: Suresh K
authors.initials: SK
authors.lastname: Mukherji
mesh_terms: D000368:Aged; D004677:Encephalocele / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D010579:Petrous Bone