Near-Infrared Fluorescence Lymph Node Mapping: A Surgical Technique for Cancer Detection

What Near-Infrared Fluorescence Lymph Node Mapping Is

Near-infrared (NIR) fluorescence lymph node mapping is a minimally invasive surgical technique used to identify sentinel lymph nodes, which are the first nodes that cancer cells may spread to from a primary tumor. By injecting a near-infrared fluorescent dye like indocyanine green (ICG), surgeons can track the path of the dye through the lymphatic system and locate these critical nodes.

This method is particularly useful in oncology for early detection and staging of various cancers, such as breast cancer, melanoma, and head and neck tumors. It allows for more precise surgical interventions, reducing the risk of metastasis by removing only the affected nodes.

How It Works

The process begins with the injection of ICG into the tumor site or surrounding tissue. The dye is taken up by lymphatic vessels and transported to the sentinel lymph node, where it accumulates due to the high permeability of the lymphatic capillaries in this region.

When illuminated with near-infrared light, the ICG emits fluorescence that can be detected using specialized imaging equipment. This allows surgeons to visualize the sentinel nodes under a surgical microscope equipped with a NIR camera and filter, enabling accurate identification and removal.

Why It Matters

NIR fluorescence lymph node mapping is significant because it provides real-time imaging of lymphatic drainage patterns, which can be challenging to assess using traditional methods. This technique enhances the accuracy of surgical procedures by ensuring that all affected nodes are identified and removed, potentially improving patient outcomes.

Moreover, it reduces the need for more invasive techniques such as sentinel node biopsy or axillary dissection, thereby minimizing postoperative complications and recovery times.

Real-World Applications

This technique is widely used in clinical settings to guide surgical interventions. For instance, in breast cancer surgery, it helps identify the sentinel lymph nodes before performing an axillary dissection, allowing for a more targeted approach.

In head and neck cancers, NIR fluorescence mapping can help locate sentinel nodes that may be difficult to visualize using conventional methods, ensuring comprehensive treatment of the disease.

Frequently asked questions

Try it live

Everything above runs in your browser — open NIR Fluorescence Lymph Node Mapping (2D Cross-Section) and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.