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Variants of the supratrochlear (STr) and supraorbital (SO) arteries in a frontal view. (A) More rectilinear course of STr and SO (5 right and 4 left sided) in a 29-year-old female. (B) Very small STr and SO close to each other (1 right and 1 left sided) in a 62-year-old male.
