The anterior triangle is the front region of each side of the neck, bounded by the lower border of the mandible above, the midline in front and the anterior border of sternocleidomastoid behind. The hyoid bone and digastric and omohyoid muscles divide it into the submental, submandibular, carotid and muscular triangles.
| Location | Front of the neck on each side of the midline. |
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A descriptive region used to locate structures and lesions in the front of the neck.
Most neck surgery, including thyroidectomy, carotid endarterectomy and submandibular gland excision, is carried out within the anterior triangle. Lumps here are commonly lymph nodes, thyroid swellings, branchial cysts or carotid body tumours, and the triangle is a basic framework in examining a neck lump.
A congenital fluid-filled lump that usually appears at the anterior border of sternocleidomastoid in young adults and may become infected.
Enlarged lymph nodes in the anterior triangle from infection or cancer of the head and neck, a common reason for neck examination.
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