Persistent hypoglossal artery
Repeated drop attacks.
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Persistent left embryonal artery entering the skull through the hypoglossal foramen. Hypoplastic vertebral arteries. Calcified plaque in the left ICA.
Among the four persistent primitive anastomoses between the carotid and basilar system, the hypoglossal artery is the one most likely to cause clinical symptoms.
- De caro R, Parenti A, Munari PF. The persistent primitive hypoglossal artery: a rare anatomic variation with frequent clinical implications. Ann. Anat. 1995;177 (2): 193-8. - Pubmed citation