What is a Sentinel Lymph Node Biopsy?
Cancer develops in a primary organ, e.g. the breast, and spreads via lymphatics and blood stream in a stepwise fashion. The draining lymph nodes are first in the line of spread and staging of the cancer involves checking the lymph nodes for actual evidence of spread. This is achieved by surgically removing a large sampling of lymph nodes, via a surgical procedure called Lymph Node Dissection. This often disrupts normal lymphatic channels, which causes drainage problems for normal lymph drainage. This results in swelling upstream, called lymphedema.