Are there any studies that show CH's are or are NOT genetic?

Lancet Neurol. 2004 May;3(5):279-83.   


Epidemiology and genetics of cluster headache.

Russell MB.

Department of Neurology, Akershus University Hospital, Oslo, Norway. m.b.russell@klinmed.uio.no

Cluster headache, the most severe primary headache, is characterised by unilateral pain, ipsilateral autonomic features, and, in many cases, restlessness. Recent epidemiological studies indicate that the prevalence of cluster headache is about one person per 500. Genetic epidemiological surveys indicate that first-degree relatives are five to 18 times-and second-degree relatives, one to three times-more likely to have cluster headache than the general population. Inheritance is likely to be autosomal dominant with low penetrance in some families, although there may also be autosomal recessive or multifactorial inheritance in others. To date, no molecular genetic clues have been identified for cluster headache. Identification of genes for cluster headache is likely to be difficult because most families reported have few affected members and genetic heterogeneity is likely. Future focus should be on ion channel genes and clock genes. This review summarises the epidemiology and genetics of cluster headache.

Publication Types:
Review

PMID: 15099542 [PubMed]
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Neurology. 2001 May 8;56(9):1233-6. 


Increased familial risk of cluster headache.

Leone M, Russell MB, Rigamonti A, Attanasio A, Grazzi L, D'Amico D, Usai S, Bussone G.

Carlo Besta National Neurological Institute, Milan, Italy.

The authors studied the occurrence of cluster headache in the families of 220 Italian patients with cluster headache. A positive family history was found in 20% (44/220) of the families. Compared with the general population, first-degree relatives had a 39-fold significantly increased risk of cluster headache. Second-degree relatives had an eightfold significantly increased risk. The increased familial risk strongly supports the hypothesis that cluster headache has a genetic component in some families.

PMID: 11342697 [PubMed]

This is a fantastic article, thanks Bob