Abstract Background The primitive trigeminal artery (PTA) is the most commonly described fetal anastomosis between the carotid and vertebrobasilar circulations. Case presentation We report a 42-year-old patient presenting with internal carotid dissection. and imaging features of brainstem infarction. Conclusion Based on the imaging studies we presume occlusive carotid dissection with ... https://www.hacklinkci.com/