Regional first - CMH advances breast cancer care in Waterloo Wellington

Wed, 04/20/2022 - 12:56

A multi-disciplinary team at Cambridge Memorial Hospital (CMH) is pleased to announce it is the first in Waterloo Wellington to use Magseed localization to remove breast lesions. This revolutionary technology is used instead of wires in a common procedure to remove breast lesions, reducing discomfort for patients while streamlining care. The procedure was performed for the first time on April 4, helping to advance the standard of breast cancer care in the Region of Waterloo. The Magseed® marker has already helped over 100,000 women to benefit from more accurate marking and removal of breast tumours worldwide.

“This is an exciting step forward for breast cancer care in our region and another innovative tool our surgical and diagnostic imaging teams will use to enhance our breast care services,” said Dr. Winnie Lee, Interim Chief of Staff, and Chief of Diagnostic Imaging. “With the introduction of Magseed®, our surgeons are better able to localize and remove the breast lesion, while improving the patient experience and increasing the efficiency of the teams involved. This new technology has the potential to have a significant and positive impact on care at CMH. It truly is a multi-disciplinary and patient-centered advancement in breast care.

The Magseed® marker is a small seed made from surgical grade steel. The procedure using the Magseed marker involves a radiologist placing the seed into a breast lesion before surgery, to guide the surgeon in its removal in the operating room. Using a dedicated probe called Sentimag®, the seed within the lesion becomes visible allowing the surgeon to remove the lesion more precisely. This means removing less tissue which can lead to a better cosmetic outcome for patients. The Magseed® marker can be placed days or weeks ahead of surgery. Once placed, it cannot be dislodged or damaged1 and can be detected with precision when needed.

The Magseed can be inserted under image-guidance up to 30 days prior to the breast surgery, which is much more comfortable for patients. It also allows more flexibility for scheduling insertion or localization of the breast lesion, and the date of surgery. In the traditional guidewire method of cancer marking, the wire is placed on the day of surgery.

“We did our first biopsies on April 4 and all went better than planned, and in less time than usual,” added Dr. Donna Kolyn, General Surgeon at CMH. “Now that patients can have the Magseed placed well in advance of their surgery, the time constraints we had with the older method are no longer there. This is better for the patient because they don’t need to be here for very long and with the time saved, we may be able to schedule more patients in a day.”


Lee added: “CMH is very proud of its legacy to offer complete, integrated breast care for our community. From consistently meeting Cancer Care Ontario’s targets for diagnosis and grading tumours, to timely surgeries and being able to offer highly innovative breast reconstruction services, patients can rest assured that they have what they need at their local hospital”.  




About Cambridge Memorial Hospital

Cambridge Memorial Hospital is an acute care hospital offering a full complement of integrated services including surgery, maternity, laboratory, diagnostics and emergency. It employs over 1,600 dedicated and skilled health care professionals, technicians and staff, 250 physicians and almost 500 volunteers providing exceptional care to the residents of Cambridge, the township of North Dumfries and the Region of Waterloo. For more information, visit


About Endomag

Endomag is a global technology company that believes everyone deserves a better standard of cancer care. Many of the world’s leading physicians and hospitals use the company’s technologies to help women with breast cancer avoid surgery when it isn’t needed, and experience better outcomes when it is.

Originally founded in 2007 by professors at University College London (UCL) and the University of Houston, Endomag harnesses the power of magnetics to enable a better standard of cancer care.

The heart of the company’s product platform is the Sentimag® localization system. The Sentimag® system features a probe which works like a metal detector, and when placed near the skin’s surface is used to detect Endomag’s magnetic seed (Magseed®) or liquid tracer (Magtrace®), for tissue localization and sentinel node biopsy procedures. Today, the Sentimag® system has been used in over 225,000 patient procedures worldwide.

Endomag is a global company headquartered in Cambridge, UK, with an office in Austin, Texas. To date, the company has helped hundreds of thousands of patients around the world access more precise and less invasive breast cancer care. To learn more visit:


Media contact
Stephan Beckhoff
Manager, Public Affairs & Communications
Cambridge Memorial Hospital
519.621.2333 x2427