Health
Diamond Sensors Offer New Hope for Tracing Breast Cancer Spread
UK researchers have developed a novel diamond-based sensor that could transform the way doctors track the spread of breast cancer, offering a safer and less invasive alternative to existing methods.
When breast cancer spreads, it often first reaches the lymph nodes near the tumour. Determining whether cancer has metastasised to these nodes is a critical step in treatment planning. Traditionally, doctors have relied on radioactive tracers or fluorescent dyes to identify affected nodes. However, these methods come with drawbacks: some patients are allergic to the dyes, while the use of radioactive materials requires specialised facilities and safety precautions that are not always available in hospitals.
The new technique, designed by scientists at the University of Warwick, uses tiny diamond sensors to trace the cancer’s route. Before or during surgery, doctors could inject a magnetic tracer fluid into the tumour. This liquid travels through the lymphatic system, mimicking the movement of cancer cells. The breakthrough lies in a diamond-tipped magnetic field sensor that can then detect the tracer inside the lymph nodes, allowing surgeons to identify which ones need removal.
Diamonds contain unique properties known as nitrogen vacancy centres, or colour centres, that are highly sensitive to changes in magnetic fields. These centres not only make diamonds an effective detector but also give them a distinct pink hue. “These colour centres allow the diamond to detect very small changes in magnetic field and give the diamonds a lovely pink colour,” explained Professor Gavin Morley, a physicist at the University of Warwick and one of the study’s authors.
The Warwick team succeeded in miniaturising the sensor’s tip to just 10 millimetres, making it small enough for use in surgery while retaining the sensitivity needed to detect magnetic tracer fluids. This marks the first time a diamond-based sensor of this size has been capable of detecting the tracers, according to the study published in Physical Review Applied.
Importantly, the researchers stressed that their work did not receive financial support from Endomagnetics Ltd, the company that manufactures the magnetic tracer used in the experiments.
Experts in the field have welcomed the development. Dr Stuart Robertson, a breast cancer surgeon in England, noted that magnetic sensors are already widely used to assess whether breast cancer has spread. The diamond sensor, he said, could further “optimise magnetic technology” and improve surgical outcomes.
If proven effective in clinical settings, the diamond-based sensors could provide doctors with a safer, non-radioactive tool to guide treatment while sparing patients from potential side effects associated with current techniques. The innovation adds to the growing use of magnetic technologies in oncology, raising hopes for more precise and patient-friendly cancer care in the future.
Health
World Cup Emotion Can Strain the Heart, Cardiologists Warn Fans at Risk
As the World Cup begins, medical experts are cautioning football fans with underlying heart conditions that the emotional intensity of matches can place unexpected strain on the cardiovascular system.
Cardiologists say that the excitement, tension, and anxiety generated during high-stakes games can trigger physical reactions similar to intense exercise, raising heart rate, blood pressure, and stress hormones.
“Intense emotions, whether positive or negative, can act as ‘precipitating risk factors’ for cardiovascular events such as heart attack,” said Paola Santalucia, a cardiologist and board member of the European Heart Network.
She explained that moments of extreme excitement, such as a decisive penalty shootout or a last-minute goal, may pose risks for people already living with heart disease. Those with additional risk factors, including hypertension, obesity, or smoking habits, are also advised to be cautious during emotionally charged matches.
Research using wearable devices has shown that during major football events, some fans experience heart rates climbing as high as 150 beats per minute. That level is comparable to sprinting and reflects how strongly the body reacts to emotional stress.
A study examining supporters during the 2025 German Cup final found that even watching from home can significantly affect physiological responses. “They still had an increase in heart rate that compares to walking, even though they didn’t walk,” said Christian Deutscher, professor of sports economics at Bielefeld University and co-author of the study.
He noted that the most intense reactions often occur not during goals themselves, but during moments of uncertainty such as VAR checks, penalty shootouts, or shots striking the post. These unpredictable situations, he said, are what drive the strongest emotional and physical responses among fans.
Deutscher also pointed out that stadium spectators may experience even greater strain due to environmental factors such as heat and alcohol consumption.
However, experts emphasize that football itself is not inherently dangerous. Instead, it is the body’s natural response to excitement that can create temporary stress.
“The adrenergic stimulation is at its max: extreme high blood pressure, high heart rate, and adrenaline, cortisol, skyrocketing,” said Dan Atar, professor of cardiology at Oslo University Hospital. In rare cases, he added, this surge can contribute to the rupture of arterial plaque in vulnerable individuals, potentially leading to a heart attack.
Atar stressed that such events can occur in everyday situations as well, including physical exertion like shoveling snow. “It is in no way dangerous to watch a football game,” he said. “All this is physiologic. It’s not dangerous to be excited.”
Still, he acknowledged that combining emotional stress with alcohol, heat, and pre-existing conditions can increase risk for some viewers.
Doctors advise those at higher risk to continue prescribed medications, limit alcohol intake, avoid smoking, and watch for warning signs such as chest pain or irregular heartbeat.
“The key message is not to avoid enjoying the match, but to do so with moderation and awareness,” Santalucia said.
Health
AI Models Show Ability to Mimic Human Emotions, Offering New Pathways for Mental Health Research
Health
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