Cystic triangle: boundaries, contents, and clinical importance

A cystic triangle is a triangular region located in the neck, bounded by the sternocleidomastoid muscle, the trapezius muscle, and the clavicle. The contents of the cystic triangle include the thyroid gland, the common carotid artery, the internal jugular vein, and the vagus nerve.

The clinical importance of the cystic triangle lies in its proximity to important structures such as the thyroid gland and major blood vessels. Pathologies within the cystic triangle, such as thyroid nodules or cysts, can cause symptoms such as difficulty swallowing, hoarseness, or neck swelling. In addition, the cystic triangle is a common site for lymph node enlargement, which can be a sign of infection or malignancy.

Overall, a thorough understanding of the boundaries, contents, and clinical importance of the cystic triangle is essential for healthcare professionals in diagnosing and managing neck pathologies.