thoracic duct
Major lymphatic vessel in the chest that can be injured during thoracic surgery, leading to chylothorax.
Full Definition
The thoracic duct is the largest lymphatic vessel in the human body, running from the abdomen through the posterior mediastinum to drain into the left subclavian vein. It carries chyle (lymphatic fluid containing digested fats) from most of the body back to the systemic circulation. In thoracic oncology, the thoracic duct is at risk of injury during esophagectomy, mediastinal lymph node dissection, and other extensive thoracic procedures. Injury to the thoracic duct results in chylothorax, a potentially serious complication requiring prompt recognition and management. Understanding the anatomical course and variations of the thoracic duct is essential for thoracic surgeons.
Usage
Usage note: Anatomical structure critical in thoracic surgery; injury leads to specific complication (chylothorax).
In Context
- "Careful dissection around the thoracic duct is essential during esophagectomy to prevent chylothorax." — Operative note
- "Postoperative chylous drainage suggested thoracic duct injury during the procedure." — Complication report