A patient with cerebral venous sinus thrombosis induced by facial hyaluronic acid injection.

The frontal diploic veins go straight dorsomedially to its termination near the midline of the frontal bone, and then the posterior transverse diploic veins drain in either the transverse or sigmoid sinus. When HA enters the intracranial venous sinus, it could easily cause venous sinus thrombosis, which might induce increased intracranial pressure, brain edema, and parenchymal brain injury, leading headache and motor or sensory impairment [[6]]. [Extracted from the article]