We would like to thank Dr. Caplan for his useful comments.1 The abnormalities in our patients are indeed quite similar to the abnormalities found in some migraine patients, as shown to us by Dr. Caplan. Our patient, however, did not have a history of migraine, nor has she developed migraine since the episode described in our case-report.2 Our posterior reversible encephalopathy syndrome/reversible posterior leukoencephalopathy syndrome diagnosis was essentially a diagnosis 'per exclusionem', and we arrived at that diagnosis after extensive ruling-out of other conditions, and after follow-up imaging. The clinico-radiological differential diagnosis of migraine causing such MR abnormalities is a good suggestion. However, because we could not find an article describing such asymmetrical MR abnormalities in migraine, it did not occur to us to mention that possibility in the discussion.