A 43-year-old woman presenting with subacute, bilateral, sequential facial nerve palsies, then developing pseudotumour cerebri.

A patient presented elsewhere with what appeared to be a simple, unilateral, chronic suppurative otitis media and then developed an ipsilateral facial palsy. She soon developed the same problem on the other side. At the time, a brain MRI had been ordered but the clinician did not review it with a radiologist. The surgical specimens were not sent for histopathology. When transferred to our institution 3 months later, the patient had severe bilateral papilloedema due to intracranial hypertension due to missed cerebral venous sinus thrombosis. Further surgery revealed that the pathology in the temporal bone was B-cell lymphoma, which, fortunately, responded to chemoradiotherapy. There was good resolution of the facial palsies, but the patient has severe permanent visual loss due to optic atrophy.