Figure 1: STA originated from the CCA, whereas LA and FA arose from the ECA as a common linguofacial trunk. CCA: Common carotid artery, ICA: Internal carotid artery, ECA: External carotid artery, STA: Superior thyroid artery, LFT: Linguofacial trunk, LA: Lingual artery, FA: Facial artery, DM: Digastric muscle