Supraclavicular triangle

The supraclavicular triangle is one of the paired triangles in the posterior 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

• anterior: posterior border of sternocleidomastoid
• posterior: anterior border of trapezius
• superiorly: inferior belly of omohyoid
• floor: first rib, scalenus medius and first slip of serratus anterior
• roof: skin, superficial fascia, platysma and investing layer of deep cervical fascia

Contents

• third part of the subclavian artery
• brachial plexus trunks
• nerve to subclavius
• lymph nodes