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Filler injection into the glabella is well known to be one of the most dangerous procedures due to the high risk of embolism and intravascular injection. Despite the conventional insertion guidelines for the cannula in the middle of the forehead for injections into the glabella or radix, vascular structures can be observed during anatomical dissection procedures. The aim of this study was to characterize the blood vessels around the forehead midline in order to provide crucial anatomical information for ensuring the safety of noninvasiv