Cavernoma Alliance UK Cavernoma Alliance UK supports people affected by cavernoma. A cavernoma is a common but often unheard of condition caused by a cluster of abnormal blood vessels in the brain or spine, which look like a raspberry. 1 in 625 people have a cavenoma and when symptomatic they can cause haemorrhages, seizures and other serious neurological deficits. Our mission is to improve the quality of life for those affected through education, support and research.