Fig. (4) Schematic diagram of the carotid triangle of the neck illustrating the variant origin of the superior thyroid artery (STA) and superior laryngeal artery (SLA). Note that superior thyroid artery (STA) is arising from the common carotid artery (CCA) instead of external carotid artery (ECA). Similarly, superior laryngeal artery (SLA) is originating from the external carotid artery (ECA) instead of superior thyroid artery (STA). Internal laryngeal nerve (ILN) which accompanies the superior laryngeal artery (SLA) to pierce the thyrohyoid membrane is also shown. (ICA- Internal carotid artery, TG- Thyroid gland, SCMSternocleidomastoid, PD- Posterior belly of digastric).