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Assessment of hypothalamic macrostructure in episodic cluster headache: a volumetric segmentation MRI study
Davide Chiffi1, Antonio Di Renzo2, Giada Giuliani3
1Department of Human Neurosciences, Sapienza University of Rome, Viale dell'Università 30, 00185, Rome, Italy. davide.chiffi@uniroma1.it.
La Radiologia Medica
|June 27, 2025
Summary
Macrostructural analysis of the hypothalamus in episodic cluster headache (eCH) revealed no significant volume differences between patients and controls. This suggests functional, not structural, hypothalamic changes may underlie eCH pathophysiology.
Area of Science:
- Neuroscience
- Neurology
- Medical Imaging
Background:
- The hypothalamus is functionally implicated in episodic cluster headache (eCH) pathophysiology.
- However, its macrostructural role in eCH remains poorly understood.
Purpose of the Study:
- To investigate macrostructural differences in total hypothalamic volume and its subunits in patients with eCH during headache-free periods.
- To compare hypothalamic volumetry between eCH patients and healthy controls (HCs).
Main Methods:
- Volumetric analysis of the hypothalamus and its subunits using MRI T1-weighted sequences.
- Comparison of 26 eCH patients (during bout periods, outside attacks, off medication) with 20 age- and sex-matched HCs.
- Statistical analysis using general linear models, adjusting for age, sex, and total intracranial volume.
Main Results:
- No statistically significant differences in total hypothalamic volume or individual hypothalamic subunit volumes were observed between eCH patients and HCs.
- No correlations were found between hypothalamic volumes and clinical features of cluster headache.
Conclusions:
- The findings suggest that macrostructural changes in the hypothalamus are not a primary feature of eCH.
- The pathophysiology of eCH may be related to network-level functional alterations rather than observable structural changes in the hypothalamus.
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