Christian Roth1, Andreas Ferbert2, Monika Huegens-Penzel3, Ralf Siekmann3, Tobias Freilinger4. 1. Department of Neurology, DRK-Kliniken Nordhessen, Kassel, Germany. Electronic address: roth99@web.de. 2. Department of Neurology, Klinikum Kassel, Germany. 3. Department of Neuroradiology, Klinikum Kassel, Germany. 4. Centre of Neurology and Hertie-Institute for Clinical Brain Research, University of Tübingen, Germany.
Abstract
BACKGROUND: Familial hemiplegic migraine (FHM) is a rare monogenic form of migraine with aura with three distinct genetic subtypes (FHM1-3). Imaging studies during acute FHM attacks are scarce in the literature. This is particularly true for the FHM2 subtype. PATIENTS AND METHODS: In this monocentric study, we retrospectively evaluated imaging data of four different patients with genetically confirmed FHM2. Analysis comprised a total of eight cMRI and two CT perfusion studies, which were obtained during a total of six different attacks. RESULTS: cMRI investigations at all available time-points were without evidence of cytotoxic edema. The most prominent finding (four attacks in three patients) was swelling and/or cortical hyperintensity of the affected cerebral hemisphere on T2/FLAIR-weighted MRI. Further changes, encountered only in a few patients, included increased perfusion of the affected hemisphere (as assessed by perfusion CT) as well as dilatation of the middle cerebral artery. CONCLUSION: Our data from a sizeable cohort of FHM2 patients highlight that swelling / cortical hyperintensity of the clinically affected cerebral hemisphere - which has been previously reported mainly in FHM1 - can be observed also in FHM2. Further, they suggest that these changes, which tend to be present not in the very beginning, but rather later on during attacks, may be a possible correlate of the prolonged attack duration in our patients.
BACKGROUND:Familial hemiplegic migraine (FHM) is a rare monogenic form of migraine with aura with three distinct genetic subtypes (FHM1-3). Imaging studies during acute FHM attacks are scarce in the literature. This is particularly true for the FHM2 subtype. PATIENTS AND METHODS: In this monocentric study, we retrospectively evaluated imaging data of four different patients with genetically confirmed FHM2. Analysis comprised a total of eight cMRI and two CT perfusion studies, which were obtained during a total of six different attacks. RESULTS: cMRI investigations at all available time-points were without evidence of cytotoxic edema. The most prominent finding (four attacks in three patients) was swelling and/or cortical hyperintensity of the affected cerebral hemisphere on T2/FLAIR-weighted MRI. Further changes, encountered only in a few patients, included increased perfusion of the affected hemisphere (as assessed by perfusion CT) as well as dilatation of the middle cerebral artery. CONCLUSION: Our data from a sizeable cohort of FHM2patients highlight that swelling / cortical hyperintensity of the clinically affected cerebral hemisphere - which has been previously reported mainly in FHM1 - can be observed also in FHM2. Further, they suggest that these changes, which tend to be present not in the very beginning, but rather later on during attacks, may be a possible correlate of the prolonged attack duration in our patients.