Dural Arteriovenous Fistula Presenting As Pulsatile Tinnitus.

Teaching point: We report magnetic resonance imaging characteristics of a dural arteriovenous fistula (dAVF), a possible cause of pulsatile tinnitus.

Clival Chordoma: A Rare Finding in Children.

Teaching point: Clival chordoma is a rare find in children, presenting as a locally destructive, T2 hyperintense, and strongly enhancing mass.

Kiloh-Nevin Syndrome.

Teaching point: The Kiloh-Nevin Syndrome is a rare entrapment syndrome of the median nerve, with a distinct muscle edema pattern of the forearm.

Imaging of inflammatory and infectious diseases in the temporal bone.

Inflammatory and infectious diseases of the temporal bone are a major indication to perform high-resolution CT and MR imaging studies. Such studies allow one to evaluate the extent of the disease in the soft tissues and in the bony structures of the temporal bone. On these same imaging studies the possible extension of the infection to surrounding regions is visualized. In this article a segmental approach is used, focusing on four structures in the temporal bone: the external ear, the otomastoid and petrous apex, the inner ear, and the facial nerve. For each of the four sections imaging findings are described and illustrated, and if relevant a differential diagnostic approach is highlighted.