Sentinel node is the first node that is involved in the drainage of tumours within the primary lymphatic basin of N0 neck.
This technique mainly involves an injection of radionuclide at the primary site and the patient is then imaged in an attempt to identify the sentinel node. once this is identified, it can be removed and evaluated using conventional serial sectioning and staining with H or E and/or immunocytochemistry to confirm or to rule out the presence of the metastatic disease.
This technique has been mainly used for:
WHAT ARE THE CONTROVERSIS OR INHERENT PROBLEMS WITH SENTINEL NODE BIOPSY?
The exact nature of the head and neck lymphatic drainage remains unclear