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Hand-Held Probe Can Detect Cancer Cells in Real-Time During Surgery

June 29th, 2017 Conn Hastings Neurosurgery, Ob/Gyn, Pathology, Surgery, Thoracic Surgery, Urology

Scientists in Montreal, Canada have perfected a hand-held Raman spectroscopy probe that surgeons can use to distinguish between cancer cells and normal tissue.

Raman spectroscopy is a technique that involves shining light on a material and analyzing how it scatters. Scientists have used the method for years to analyze and characterize living tissues and cells. This probe is the latest iteration of a Raman device this research team first developed in 2015. They have now perfected the design, and the new device has improved accuracy and is highly specific. It can reportedly detect brain, lung, colon and skin cancer cells, with almost 100% sensitivity.

In practical terms, a surgeon can point the probe at a suspect tissue during surgery and see if it contains any cancerous cells. This could be a game changer, as sometimes tumors are very difficult to distinguish from healthy tissue. “Minimizing, or completely eliminating, the number of cancer cells during surgery is a critical part of cancer treatment, yet detecting cancer cells during surgery is challenging,” explains Dr. Kevin Petrecca, a neurosurgical oncology specialist, and author on the recent study published in Cancer Research. “Often it is impossible to visually distinguish cancer from normal brain, so invasive brain cancer cells frequently remain after surgery, leading to cancer recurrence and a worse prognosis. Surgically minimizing the number of cancer cells improves patient outcomes.”

The new probe incorporates fluorescence spectroscopy to analyze the metabolic composition of the cells. The first probe is currently being tested in a large-scale clinical trial on patients with brain tumors. However, in a smaller trial, the new probe demonstrated a 10% increase in cancer detection sensitivity compared with the older design.

Schematic depiction of the probe being used to interrogate brain tissue during surgery. The image shows a photograph of the probe held by a surgeon, Raman spectral associated with normal brain and cancer, as well as a magnetic resonance image (MRI) of a brain cancer patient with the red area representing the tumor.

Flashback: Spectroscopy Probe to Improve Intraop Brain Cancer Detection…

Study in Cancer Research: Highly accurate detection of cancer in situ with intraoperative, label-free, multimodal optical spectroscopy…

Via: Polytechnique Montréal…

Conn Hastings

Conn Hastings received a PhD from the Royal College of Surgeons in Ireland for his work in drug delivery, investigating the potential of injectable hydrogels to deliver cells, drugs and nanoparticles in the treatment of cancer and cardiovascular diseases. After achieving his PhD and completing a year of postdoctoral research, Conn pursued a career in academic publishing, before becoming a full-time science writer and editor, combining his experience within the biomedical sciences with his passion for written communication.

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