This video contains a simplified, visual explanation of the procedure and side-effects (lymphedema) of a sentinel lymph node biopsy.

A Sentinel node biopsy is a surgical procedure used to determine whether breast cancer/melanoma has spread beyond a primary tumor into the lymphatic system.

Timecodes:
0:00 Introduction
0:08 What is a sentinel node?
0:23 What is a sentinel node biopsy?
0:37 Procedure
1:16 Axillary Lymph Node Dissection
1:35 Side-effects (lymphedema)
2:05 The end