Scientists at the University of Manchester in the UK have announced that cancer is a modern-day, man-made disease after studying mummies, fossils and classical literature.
According to the team of scientists, cancer is fuelled exclusively by the excesses of modern life, and tumors were rare up until very recently when pollution and poor diets became a health concern.
In the study of Egyptian mummies, for example, the researchers found no signs of cancer in many of them—with the exception of one isolated case. Slivers of tissue from hundreds of Egyptian mummies were rehydrated and placed under the microscope. The researchers found only one case of cancer in the mummies examined.
In the past, some researchers have argued that the ancient Egyptians did not live long enough to develop cancer. To dismiss this weak argument, the researchers pointed out that other age-related disease, such as hardening of the arteries and brittle bones, occurred during this time.
The journal Nature Reviews Cancer reports that fossil evidence of cancer is not solid, with scientific literature providing a few dozen, mostly disputed, examples in animal fossils. Even the study of thousands of Neanderthal bones has provided only one example of a possible cancer.
Evidence of cancer in ancient Egyptian texts is also tenuous, with cancer-like problems more likely being caused by leprosy or even varicose veins. It is said the ancient Greeks were probably the first to define cancer as a specific disease, and to distinguish between benign and malignant tumors.
The 17th century provides the first descriptions of operations for breast and other cancers. However, the first reports in scientific literature of distinctive tumors only occurred in the past 200 years. Nasal cancer in snuff users appeared in 1761. Scrotal cancer in chimney sweeps was also discovered in 1775.
Lead researcher of this current study, Michael Zimmerman said there should have been plenty of cancer-related evidence available in ancient societies because they lacked effective healthcare.
“In an ancient society lacking surgical intervention, evidence of cancer should remain in all cases. The virtual absence of malignancies in mummies must be interpreted as indicating their rarity in antiquity, indicating that cancer-causing factors are limited to societies affected by modern industrialization,” Zimmerman said.
Professor Rosalie David, who also played a key role in the analysis of the possible reference to the disease in classical literature, fossil records and mummified bodies, said:
“In industrialized societies, cancer is second only to cardiovascular disease as a cause of death. But in ancient times, it was extremely rare. There is nothing in the natural environment that can cause cancer. So it has to be a man-made disease, down to pollution and changes to our diet and lifestyle. The important thing about our study is that it gives a historical perspective to this disease. We can make very clear statements on the cancer rates in societies because we have a full overview. We have looked at millennia, not one hundred years, and have masses of data. Yet again extensive ancient Egyptian data, along with other data from across the millennia, has given modern society a clear message – cancer is man-made and something that we can and should address.”
The researchers recommended a healthy diet, regular physical activity and maintenance of a healthy weight. These three lifestyle choices are believed to be able to prevent about a third of the most common cancers known to researchers.
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