The Venous Lymph Node Flap: Concepts, Experimental Evidence, and Potential Clinical Implications

Area of Science:

• Regenerative Medicine
• Surgical Innovation
• Lymphatic Physiology

Background:

• Traditional lymph node flaps (LNFs) primarily focus on vascular supply, neglecting lymphatic system anatomy.
• A new concept, the venous LNF, is proposed based on lymphatic system's anatomical and physiological features.
• This study explores the venous LNF for potential lymphedema treatment.

Purpose of the Study:

• To investigate the feasibility and efficacy of a venous lymph node flap (LNF).
• To assess the potential clinical application of venous LNFs in lymphedema treatment.
• To evaluate the histological changes in lymph nodes after venous LNF transfer.

Main Methods:

• Eight Wistar rats underwent cervical venous LNF harvesting along the external jugular vein.
• Flaps were transferred in a flow-through manner along the femoral vein.
• Lymphatic continuity was assessed using methylene blue, followed by histological evaluation.

Main Results:

• All rats survived without complications, with patent venous anastomoses.
• Reestablishment of lymphatic continuity with surrounding tissues was observed in all rats.
• Histology revealed reduced stromal compartment and preserved lymphatic/sinus and vascular compartments in lymph nodes.

Conclusions:

• The novel venous LNF effectively restores lymphatic continuity.
• Lymph nodes undergo significant histoarchitectural changes during healing.
• Venous LNFs present theoretical advantages over arteriovenous LNFs for lymphedema treatment, warranting further investigation.