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Primary and secondary chronic cluster headache: two separate entities?
P Torelli1, D Cologno, C Cademartiri
1Headache Centre, Institute of Neurology, University of Parma, Italy. paolatorelli@libero.it
Cephalalgia : an International Journal of Headache
|February 13, 2001
Summary
Chronic cluster headache (CH) presents as two distinct subtypes: chronic CH unremitting from onset (CCHU) and chronic CH evolved from episodic (CCHE). Our study found significant clinical differences, suggesting they may be separate entities.
Area of Science:
- Neurology
- Headache Medicine
Background:
- The International Headache Society (IHS) classification distinguishes two chronic cluster headache (CH) subtypes: chronic CH unremitting from onset (CCHU) and chronic CH evolved from episodic (CCHE).
- Understanding the distinct clinical characteristics of these subtypes is crucial for accurate diagnosis and management.
Purpose of the Study:
- To identify similarities and differences between CCHE and CCHU.
- To determine if CCHE and CCHU represent two separate clinical entities.
Main Methods:
- Retrospective review of patient data from the Parma Headache Centre (1975-1999).
- Analysis of clinical features and lifestyle factors in 31 CCHE patients and 38 CCHU patients.
Main Results:
- CCHE patients exhibited statistically significant differences compared to CCHU patients.
- Key distinctions included earlier CH onset and attack durations more frequently between 120-180 minutes in CCHE.
- Lifestyle analysis revealed a higher prevalence of heavy alcohol and coffee consumption in CCHU, whereas CCHE patients were more frequently heavy smokers.
Conclusions:
- Clinical features suggest that chronic cluster headache may manifest as two distinct entities.
- Further research is warranted to fully elucidate the relationship between CCHE and CCHU.