Oculomotor Nerve Palsy due to an Odontogenic Abscess Originating from the Mandibular Third Molar
MR images reveal the presence of an abscess in the cavernous sinus area (white arrow, (a)–(d)). Diffusion restriction around the right cavernous sinus indicates an abscess in the diffusion-weighted MR image (a). There is no high signal around the right cavernous sinus in the apparent diffusion coefficient map (b). Precontrast T1-weighted MR image (c). More enhancement around the right cavernous sinus area was observed in the postcontrast T1-weighted MR image (d).