
07/07/2025
This tiny blue-stained lymph node is called a sentinel node.
It’s the first node to drain lymph from the breast, & the first place cancer cells are likely to spread.
During breast cancer surgery, we use a combination of radioactive tracer & blue dye to identify this key node. Both the tracer & dye follow the same path cancer cells would take.
In surgery, we locate it by:
🔹 Detecting the “hot” node using a special probe for the radioactive tracer
🔹 Seeing the “blue” node with the naked eye
Once identified, the sentinel node is carefully removed & examined under the microscope.
🔹 If it’s clear, it’s unlikely the cancer has spread further
🔹 If cancer is present, it helps guide decisions about further surgery or treatment