The Magseed® marker is a tiny metal seed designed to mark cancers. It’s made out of surgical grade stainless steel and is located using its magnetic trace.
‘Magseed® localisation’ is the technique developed to allow radiologists and surgeons to mark and remove small and early stage breast cancers with incredible precision.
The removal of the Magseed® marker can take as little as 5 minutes but the overall duration of your surgery will depend on the additional procedure you may be having.
This differs from country to country. There are many assessments of seed localisation that have shown significant cost savings for the hospital. Follow this link to get in touch with your nearest sales distribution partner directly.
The Magseed® marker is approximately 5mm x 1mm (a fraction smaller, in fact). We typically say that’s smaller than the size of a grain of rice, but if you think there’s a better comparison, please let us know. Anyway, just know that it’s the smallest available.
The Magseed® marker is detected using our Sentimag® probe. When the marker is placed in the breast or marked lesion, it is totally inert. It is only when the probe is passed near the seed that it becomes detectable.
Learn more about how the Sentimag® probe works here.
Although the Magseed® marker is inert when not in use, it will always be detectable no matter how far ahead of surgery it is placed. Effectively, it has the same signal from day one to day 1,000.
Take a look at the indications for use page to see the approved length of implantation time the Magseed® marker has in your territory.
In lots of ways! Too many to list in a short FAQ in fact. To begin to explain the differences, it features as part of our ‘Why Magseed‘ page.
In some ways they’re quite similar; small, accurate and convenient, but there are a number of crucial differences, namely that the Magseed® marker is non-radioactive, and therefore does not decay like a radioseed does.
The Magseed® marker has an ‘end-deploy’ system, this simply means that where you place the tip of the needle is where the seed will be placed. That makes it very easy to accurately deploy the seed. Ideally, the Magseed® marker should be placed in the centre of the lesion.
It can be placed in the breast using Ultrasound, Stereotactic, Tomographic or Mammographic image guidance, depending on preference or tumour type.
Introducer needles are currently available in 7cm and 12cm versions.
The Magseed® marker is not officially indicated for use in Nickel allergic patients. However, compared to a stainless-steel guide wire, a Magseed® marker offers significantly less exposure to Nickel.
Normal Surgical grade stainless steel contains around 10-15% Nickel. The surgical grade stainless steel used for the Magseed® marker contains less than 0.23% Ni content.
The likelihood of a Magseed® marker migrating is extremely low due to its small size. It’s twisted structure helps to promote tissue in-growth which anchors it firmly into the tissue to reduce migration.
See our ‘Magseed clinical data‘ page to see studies where it has demonstrated to have a similar migration rate as a radioseed, which is <1%. This has been proven in published studies involving thousands of patients.
A Magseed® marker cannot currently be placed under MRI guidance because the deployment needle is made of stainless steel. However, it is okay for a patient with a Magseed® marker implanted to have an MRI (1.5T & 3.0T) without causing any heating or movement of the seed.
Just like any clip, it will cause some level of void artefact but will vary depending on the sequence you use. We have commonly seen a 2-4cm artefact. However, as this is a lesion localization device and not a biopsy site marker, it’s quite rare that a patient would need an MRI whilst the Magseed marker is in place.
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