Conflict of Interest: No conflicts.
Diffusion Tensor Imaging in Episodic Cluster Headache
Article first published online: 14 NOV 2011
© 2011 American Headache Society
Headache: The Journal of Head and Face Pain
Volume 52, Issue 2, pages 274–282, February 2012
How to Cite
Teepker, M., Menzler, K., Belke, M., Heverhagen, J. T., Voelker, M., Mylius, V., Oertel, W. H., Rosenow, F. and Knake, S. (2012), Diffusion Tensor Imaging in Episodic Cluster Headache. Headache: The Journal of Head and Face Pain, 52: 274–282. doi: 10.1111/j.1526-4610.2011.02000.x
- Issue published online: 6 FEB 2012
- Article first published online: 14 NOV 2011
- Accepted for publication June 6, 2011.
- episodic cluster headache;
- white matter lesions;
- pain matrix
Background.— Cluster headache (CH) is a rare headache disorder with severe unilateral headache bouts and autonomic symptoms. The pathophysiology of CH is not completely understood. Using a voxel-based morphometric paradigm or functional imaging, a key role of the hypothalamus and the pain matrix could be demonstrated during CH episodes. However, there are no diffusion tensor imaging (DTI) data investigating the white matter microstructure of the brain in patients with CH. Therefore, we used DTI to delineate microstructural changes in patients with CH in a headache-free state.
Methods.— Seven male patients with episodic CH and 7 healthy subjects were included and examined with a routine 1.5 T magnetic resonance imaging scanner. Whole-head DTI scans measuring fractional anisotropy were analyzed without a priori hypotheses using track-based spatial statistics.
Results.— We found significant microstructural brain tissue changes bilaterally in the white matter of the brainstem, the frontal lobe, the temporal lobe, the occipital lobe, the internal capsule, and on the right side of thalamus and cerebellum. There were further lesions in the basal frontal lobe that were part of the olfactory system. Alterations of fractional anisotropy in the brainstem might indicate changes of the medial lemniscus and central sympathetic pathways.
Conclusions.— Patients with episodic CH have microstructural brain changes in regions that belong to the pain matrix. Furthermore, we were able to detect structural changes suggesting an involvement of the olfactory system as well as lesions in the brainstem indicating an involvement of trigeminal and sympathetic systems.