St Vincent's Clinic Medical Imaging & Nuclear Medicine

Sentinel Node Lymphoscintigraphy

A sentinel node scan is used to assess the lymphatic drainage of a tumour.

What will happen when you have your Sentinel Node Lymphoscintigraphy

There are 2 main parts involved in a sentinel node scan:

  1. You will be given up to 4 injections around the tumour site (most commonly the breast) and images will be acquired initially for approximately 30 minutes. You will then be asked to massage the injection site gently and return to the Nuclear Medicine Department as requested.
  2. On your return more images will be acquired of the area for approximately 30 minutes. Sometimes further imaging can be required up to around 2 hours after the injection and the staff in the Nuclear Medicine department will let you know if this is required.

What you need to do and how to prepare for the test

You may be required to wear a gown for the scan. The scan is performed with the Gamma Camera close to your body but you do not go through a “tunnel”.

  • You will need a referral from your doctor and continue taking medications as prescribed
  • You will be in the department for approximately 30 minutes for the first part and 30 minutes for the second part of the test
  • Please bring any previous relevant X-rays or scans to your appointment
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