Omoclavicular triangle

Omoclavicular triangle is a small topographical area on the neck, and is part of the larger lateral region of the neck.

Boundary
Cranially, the triangle is bordered by the inferior belly of the omohyiod muscle (lat. venter inferior musculi omohyoidei). Caudally, this space is defined by the clavicle and ventrally by the sternocleidomastoid muscle.

Contents
Several vessels pass through the triangle :


 * Subclavian vessels,
 * Suprascapular vessels,
 * Ascending cervical artery,
 * Transverse cervical artery,
 * External jugular vein,
 * Venous angle.

Lymphatic vessels and nodes also pass through it :
 * Thoracic duct (left),
 * Right lymphatic duct (right),
 * Supraclavicular lymph nodes (Virchow-Troiser).

The triangle also contains nerves :
 * Brachial plexus,
 * Phrenic nerve,
 * Supraclavicular nerves.

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