News
Diamond sensor could be ‘game changer’ for cancer

Researchers at the University of Warwick have developed a new diamond-based sensor they say could be a “game changer” in detecting the spread of tumours.
The non-toxic and non-radioactive device uses the unique properties of diamonds to diagnose metastasised breast cancer. Metastasis is the process where cancer spreads through the body, often through lymph nodes.
Developed with the help of staff at University Hospitals Coventry and Warwickshire, the sensor works by detecting magnetic tracer fluid injected into a patient during breast cancer surgery. This enables surgeons to locate and remove affected lymph nodes, aiming to stop the cancer spreading.
At just 10mm across, it is the first diamond sensor small enough for keyhole and endoscopic surgery. The team said it can detect as little as one hundredth of a typical clinical dose of magnetic tracer fluid.
Alex Newman is a PhD student in the department of physics at the University of Warwick and first author of the study.
Newman said: “For this new diamond-based sensor, we managed to get the size of the sensor head down to just 10mm, which means it is the first diamond sensor to be able to detect magnetic tracer fluid while being small enough for endoscopic use and keyhole surgery.
“It is also very sensitive, capable of detecting one hundredth of the typical full clinical dose of magnetic tracer fluid.”
Professor Gavin Morley, senior author and group leader in the department, explained that diamonds can sense magnetic fields “thanks to colour centres in the diamond, called nitrogen vacancy centres.”
The university said cancer tracing has traditionally been done using radioactive substances, which not every hospital can handle, or with blue dye, which can trigger allergic reactions in about one per cent of cases.
It added that magnetic tracer fluids are already becoming more common, but the diamond device could allow for a smaller, more sensitive sensor without bulky electronics.
Researchers believe the technology could also help patients with lung, liver, colorectal and oesophageal cancers.
Cancer
Ovarian cancer cases rising among younger adults, study finds

Ovarian cancer cases are rising among younger adults in England, with bowel cancer showing a similar pattern, a new study suggests.
Researchers said excess weight is a key contributor, but is unlikely on its own to explain the pattern.
The authors wrote: “These patterns suggest that while similar risk factors across ages are likely, some cancers may have age-specific exposures, susceptibilities, or differences in screening and detection practices.”
They added: “Although overweight and obesity are linked to 10 of the 11 cancers evaluated and account for a substantial proportion of cancer cases, both BMI-attributable and BMI-non-attributable incidence rates have increased, though the latter more slowly, suggesting other contributors.”
The study analysed cancer incidence, meaning new diagnoses, in England between 2001 and 2019 across more than 20 cancer types, comparing adults aged 20 to 49 with those aged 50 and over.
Among younger women, cases of 16 out of 22 cancers increased significantly over the period, while among younger men, 11 out of 21 cancers increased significantly.
In particular, there was a significant rise in 11 cancers with known behavioural risk factors among adults under 50. These were thyroid, multiple myeloma, liver, kidney, gallbladder, bowel, pancreatic, endometrial, mouth, breast and ovarian cancers.
Rates of all 11 also rose significantly among adults aged 50 and over, with the notable exceptions of bowel and ovarian cancer.
Five cancers, endometrial, kidney, pancreatic, multiple myeloma and thyroid cancer, increased significantly faster in younger than in older women, while multiple myeloma increased faster in younger than in older men.
The researchers looked at established risk factors including smoking, alcohol intake, diet, physical inactivity and body mass index, a measure used to assess whether someone is underweight, a healthy weight, overweight or obese.
With the exception of mouth cancer, all 11 cancers were associated with obesity. Six, liver, bowel, mouth, pancreatic, kidney and ovarian, were also linked to smoking.
Four, liver, bowel, mouth and breast, were associated with alcohol intake. Three, bowel, breast and endometrial, were linked to physical inactivity, and one, bowel, was associated with dietary factors.
But apart from excess weight, trends in those risk factors over the past one to two decades were stable or improving among younger adults.
That suggests other factors may also play a part, including reproductive history, early-life or prenatal exposures, and changes in diagnosis and detection.
The study noted that red meat consumption fell among younger adults, while fibre intake remained stable or slightly improved in both sexes between 2009 and 2019, although more than 90 per cent of younger adults were still not eating enough fibre in 2018.
Established behavioural risk factors accounted for a substantial share of cancer cases.
Excess weight was the risk factor associated with most cancers in 2019, ranging from 5 per cent for ovarian cancer to 37 per cent for endometrial cancer.
The researchers said the findings were based on observational data, meaning the study could identify patterns but could not prove cause and effect.
They also noted there were no consistent long-term national data for several risk factors, that the analysis was limited to England rather than the UK, and that cancer remains far more common overall in older adults despite the rise in cases among younger people.
Pregnancy
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