Internal carotid agenesis: A very rare malformation where the carotid artery fails to develop. Other brain blood vessels enlarge to try to compensate for the defect and this leads to compression of parts of the brain which can cause neurological symptoms. The severity of symptoms is determined by how well the existing brain blood vessels are able to compensate for the absence of the carotid artery.
The list of signs and symptoms mentioned in various sources for Internal carotid agenesis includes the 7 symptoms listed below: * Asymptomatic * Brain blood vessel lesions * Enlarged brain blood vessels * Convulsions * Headache * Transient ischemic attacks * Hemiplegia
* Asymptomatic * Convulsions * Headache * Hemiplegia * Transient ischemic attacks