Autologous fat injection is a common aesthetic procedure for soft-tissue augmentation of the face. Although this procedure is generally regarded as safe, several patients have experienced acute visual loss or cerebral infarction after these injections. We describe a case of internal and external carotid artery fat embolism that occurred following injection of autologous fat into the face. It appeared that the injected fat entered a branch of the left external carotid artery and that the embolus likely migrated into the left internal carotid artery and distally into the left ophthalmic artery, left anterior artery, and middle cerebral artery. LEVEL OF EVIDENCE 5:
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