British study: Tears could help detect brain tumors

Tears, traditionally associated with emotion, could soon become a valuable tool in the hands of doctors. Scientists believe they contain clues about what's going on deep inside the brain and could one day help in the early diagnosis of tumors.

At the University of Manchester, Professor Petra Hamerlik is leading a new study examining this hypothesis. Initial findings suggest that changes in the composition of tears could provide a "window" into the brain, helping doctors identify a disease that is often diagnosed late and with difficulty.

As she explains, brain tumors are often detected late because their symptoms are vague—a headache or seizure may be the first sign. Delays in diagnosis can significantly impact patients' quality of life.

Why tears may be the answer

Tears don't just express emotions: they provide the eyes with oxygen and nutrients, remove waste products, and protect against infection. They are produced from plasma that is filtered through glands controlled by the brain, which gives them rich biological information./CNA

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