Omoclavicular Triangle in a Male Neck, Anterior View

Description

Framed by the inferior belly of the omohyoid superiorly and the clavicle inferiorly, the omoclavicular (supraclavicular) triangle is presented from an anterior neck perspective with the posterior border of the sternocleidomastoid forming its medial limit. Deep to the platysma and superficial fascia, the floor is formed by the prevertebral fascia overlying the scalene muscles, with the anterior scalene positioned anterior and medial to the interscalene interval. The third part of the subclavian artery lies deep and inferior, while the subclavian vein runs more anterior and inferior as it approaches the venous angle; supraclavicular lymph nodes and the terminal external jugular vein typically occupy the superficial layer. Compact anatomy. High consequence. Surgeons and proceduralists care about this triangle because it is where lines and complications meet anatomy: the subclavian vein is commonly targeted for central venous access, and a needle trajectory that drifts posteriorly toward the subclavian artery or pleural dome raises the risk of arterial puncture or pneumothorax. The region also concentrates pathology in palpable form, with supraclavicular lymphadenopathy and brachial plexus involvement from thoracic outlet syndrome often discussed using the scalene and clavicular landmarks highlighted here. Use this illustration in head and neck anatomy teaching, anesthesiology and critical care line placement modules, vascular surgery references, and clinical education on supraclavicular masses and thoracic outlet compression patterns. Anatomical accuracy verified by SciePro's Medical Advisory Board.