Presentation of hemiplegic migraine--hemiplegia and hemi-sensory loss following general anaesthesia.

We report a case of a 15-year-old male who developed severe left-sided hemiplegia and hemi-sensory loss 20 minutes after arrival in post anaesthetic care unit following an uneventful general anaesthesia for removal of a cannulated screw of left hip. Initial CT and MRI/MRA with diffusion-weighted imaging were unremarkable. The patient was transferred to The Royal Children's Hospital Melbourne and was commenced on heparin infusion pending investigation results. Complete recovery occurred within 36 hours. Eventually, hemiplegic migraine was diagnosed on the basis of negative investigations and a retrospective history of the patient's migraine. This case demonstrates that the management of peri-operative neurological deficits must be approached in a systematic fashion. Hemiplegic migraine is a well-defined clinical syndrome. It is not merely a diagnosis of exclusion.