Creating a blood test that reveals 50 types of cancer, even for those without symptoms


Scientists have developed a simple blood test to detect more than 50 types of cancer, as the test looks for the DNA that tumors release into the blood, and identifies people with cancer even when they have no symptoms.

According to the Daily Mail newspaper, this blood test is an enormous scientific value that enriches cancer research, despite the need for more work on it, and by looking at the blood of hundreds of people, American researchers determined in which part of the body the cancer was 96% accurate.

The error rate in the test was less than 1%, however, even in 12 of the heavily captured cancers, including ovarian and lung cancer, about a third of the cancers were absent – and many were in an early stage.


Scientists who developed the test and studied its accuracy to more than 1,200 people hope that one day they can save lives.

Dr. Minita Liu, the first author of the research paper on the test, said: “A blood test can detect multiple cancers in healthy people who have no symptoms indicating that people may be diagnosed early, and this leads to treatment at an early stage which is what Reduces the chances of people dying from cancer.

Researchers have trained a computer algorithm to find cancer Using blood tests for more than 3,000 patients and healthy people, then they tested success in 654 cancer patients and 610 who were cancer-free, and only some of them received a “false-positive” result, which means they were not actually cancer patients.

Cancer screening
Cancer screening

However, the authors note that not all cancers release DNA into the blood.

The exciting result of the study is that a blood test may find cancer in people without symptoms.

The researchers said that some people who had been diagnosed with cancer appeared to be in good health, as their cancer was detected only through examination or by accident during the medical examination.

Funded and developed by a company Grail American, the test works by detecting the DNA from the tumor, and a specific “pattern” in which the DNA that appears in cancer patients is altered.

The study, published in a magazine, found Annals of Oncology , That the test was better in detecting more advanced cancers.

“The first results are encouraging,” said Dr. David Crosby of the Cancer Research Center in the United Kingdom. “If the test can be adjusted to be more effective in capturing cancers in its early stages, it may become an early detection tool.”

He added that “more research is needed to improve the ability of the test to catch early cancer.”


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