Submental triangle

The submental triangle is the single midline triangle, part of the anterior triangle of the neck. The triangles of the neck are surgically focused, first described from early dissection-based anatomical studies which predated cross-sectional anatomical description based on imaging (see deep spaces of the neck).

Boundaries

• lateral: anterior bellies of both digastric muscles
• apex: chin
• base: body of the hyoid bone
• floor: mylohyoid muscle

Contents

• anterior jugular vein
• submental lymph nodes (level 1a)