Located in the mediastinum, the central part of the thoracic cavity, these trunks form from the convergence of efferent vessels that ascend along the trachea.

Clinically, these trunks are significant for their role in the potential spread of diseases, particularly thoracic cancers, making them important landmarks in oncological diagnostics and treatment planning.

The left bronchomediastinal lymph trunk often empties into the thoracic duct or directly into the venous angle, where the internal jugular and subclavian veins converge.

Anatomical variations in the bronchomediastinal lymph trunks are common and can have significant clinical relevance, particularly in the context of disease spread and surgical interventions.

This function is crucial for maintaining fluid balance, facilitating immune responses, and ensuring the clearance of metabolic waste and foreign particles from the body.

[2][3] This transportation process is vital for immune surveillance, as it enables the movement of lymphocytes and antigen-presenting cells to lymph nodes where they can detect and respond to pathogens or malignancies located within the thoracic region.

[4] Lymph trunks are also involved in the transport of lipids, particularly those absorbed from the gastrointestinal tract that are too large to directly enter the venous system.