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Acute strokes in the setting of a persistent primitive trigeminal artery
  1. Neil E Schwartz,
  2. Gregory W Albers
  1. Stanford Stroke Center, Stanford University Medical Center, Palo Alto, California, USA
  1. Correspondence to:
 Dr Neil E Schwartz
 Stanford Stroke Center, Stanford University Medical Center, 701 Welch Road, Suite B325, Palo Alto, CA 94304-5749, USA; neuro1{at}stanford.edu

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A persistent primitive trigeminal artery (PPTA) is the most common of the embryonic carotid–basilar anastomoses that remain into adulthood; an incidence of 0.1–1.0% has been reported.1 Although typically an incidental finding on angiogram or non-invasive vascular imaging, the condition has been found in association with trigeminal neuralgia2 and various vascular anomalies. We present imaging from a patient with acute ischaemia in the setting of a PPTA that is presumed to be embolic along the distribution of this anastomosis.

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