Cancer has been documented in human remains and medical texts for thousands of years

Cancer is not a modern disease. Descriptions of tumors and cancerous growths appear in Egyptian papyri from around 1600 BCE, in ancient Greek and Roman medical writings, and in skeletal remains from archaeological sites spanning millennia. The oldest known written reference to cancer comes from the Edwin Smith Papyrus, an Egyptian medical document that describes breast tumors and uses the word "tumor" in a way that suggests the Egyptians recognized cancer as a distinct condition.

What changed is not the existence of cancer, but our ability to recognize it, name it precisely, and understand what causes it. Ancient physicians could observe growths and ulcers but had no microscope, no knowledge of cells, and no way to distinguish cancer from infection or other diseases. They treated it with whatever tools they had—surgery, cautery, poultices—and most patients died.

Key Takeaways

  • Cancer appears in Egyptian medical texts from 1600 BCE and in skeletal remains from much earlier, showing the disease has affected humans for thousands of years.
  • Ancient physicians could see tumors and growths but could not identify cancer at the cellular level or understand why it developed.
  • The microscope, invented in the 1600s, allowed scientists to see cells and eventually recognize cancer as a disease of abnormal cell growth.
  • Cancer rates have risen in modern times partly because people now live long enough to develop it—cancer risk increases with age—and partly because of new environmental exposures.
  • The name "cancer" itself comes from the Greek word for crab, because some tumors resembled a crab's shape when cut open.

What ancient and medieval doctors saw, and what they missed

Hippocrates, the Greek physician who lived around 460–370 BCE, used the word "karkinos" (crab) to describe hard tumors, because the swollen veins around them resembled a crab's legs. The Romans adopted this term as "cancer." But without a way to look inside cells, ancient doctors could not see the hallmark of cancer: cells dividing uncontrollably and invading surrounding tissue.

Medieval and Renaissance physicians inherited these descriptions and added their own observations, but the fundamental problem remained. They could cut out a tumor, but they could not tell whether it would return, spread, or prove fatal. They attributed cancer to imbalances of bodily humors—blood, phlegm, yellow bile, and black bile—and treated it with bloodletting, herbs, and poultices. None of these approaches addressed the actual disease.

The microscope changed what doctors could see

In the 1600s, the invention of the microscope opened a new window into disease. By the 1800s, scientists could see cells clearly and began to notice that cancer cells looked different from normal ones. In 1858, Rudolf Virchow, a German physician, proposed that cancer arose from cells—a radical idea at the time, because many doctors still believed cancer was a fluid or a humoral imbalance.

By the late 1800s and early 1900s, pathologists could examine tissue under a microscope and diagnose cancer with far greater accuracy. They could see abnormal cells, recognize patterns, and begin to predict which tumors would spread and which might remain localized. This did not cure cancer, but it transformed how doctors understood it and how they could track the disease's progress.

Why cancer rates appear to have risen in recent centuries

Cancer was always present in human populations, but several factors have made it more common and more visible in modern times. The most important is age. Cancer risk increases sharply as people get older, because cells accumulate mutations over decades. In 1800, the average life expectancy in industrialized countries was around 40 years; today it is over 75. More people living into their 60s, 70s, and 80s means more people developing cancer.

Environmental and behavioral changes have also contributed. Tobacco use became widespread in the 1600s and 1700s and is now the leading preventable cause of cancer. Industrial pollution, certain occupational exposures, and changes in diet and physical activity have all increased cancer risk in some populations. Improved diagnosis and cancer registries—systems that track new cancer cases—have also made the disease more visible, because cases that would have gone unrecorded centuries ago are now counted.

How we know cancer existed in ancient times

Archaeologists have found evidence of cancer in human skeletons from thousands of years ago. Bone tumors, in particular, leave marks on the skeleton that are recognizable even after millennia. Mummified remains from Egypt show signs of cancer, and ancient texts describe the disease in ways that match modern understanding—a growth that spreads, resists treatment, and often proves fatal.

One famous example is the mummy of an Egyptian priest from around 1200 BCE, whose skeleton shows signs of bone cancer. Another is a Peruvian mummy from around 1500 BCE with evidence of breast cancer. These findings confirm that cancer was not introduced by modern life; it is an ancient disease that has always been part of human biology.

The difference between recognizing cancer and understanding it

For most of human history, people could see that cancer existed—they could observe a growing tumor, feel a lump, watch a wound that would not heal—but they could not understand what was happening at the level of cells and DNA. Understanding came much later. The structure of DNA was not discovered until 1953. The first clear link between a specific genetic mutation and cancer was not established until the 1970s. The idea that cancer arises from multiple mutations accumulating over time emerged in the 1980s and 1990s.

This gap between observation and understanding shaped how cancer was treated for centuries. Doctors could attempt surgery or apply topical remedies, but without knowing the cause, they could not target the disease effectively. Modern cancer treatment—chemotherapy, radiation, targeted drugs, immunotherapy—all depend on understanding cancer at the cellular and molecular level, knowledge that is barely a century old.

How cancer rates vary across time and place

Cancer rates are not uniform across the world or across history. In countries with high life expectancy and widespread tobacco use, cancer is now the second or third leading cause of death. In countries with lower life expectancy, infectious diseases remain more common killers, and fewer people live long enough to develop cancer. Within any given country, cancer rates have changed over time as smoking rates, diet, obesity, and other risk factors have shifted.

Lung cancer rates, for example, rose sharply in the mid-20th century as smoking became common, peaked in some countries in the 1980s and 1990s, and have declined in countries where smoking rates fell. Colorectal cancer rates have changed with diet and screening practices. These patterns show that while cancer itself is ancient, the specific types of cancer that are common, and how common they are, depend on how people live and how long they live.

Frequently Asked Questions

Did ancient people get the same types of cancer we see today?

Probably not in the same proportions. Lung cancer was rare before tobacco became widespread. Skin cancer rates have changed with sun exposure and migration patterns. But breast cancer, bone cancer, and other solid tumors appear in ancient remains and texts, suggesting these types have always existed. The mix of cancer types has shifted with changes in how people live and how long they live.

Why didn't ancient doctors cure cancer if they knew it existed?

They could see the disease but could not understand its cause or mechanism. Without knowing that cancer arises from abnormal cell growth, they could not target the underlying problem. Surgery could remove a visible tumor, but cancer often returns or spreads. Effective treatment required understanding cells, genetics, and how cancer develops—knowledge that did not exist until the 20th century.

Is cancer more common now because of pollution and modern life?

Partly. Tobacco, certain industrial chemicals, and air pollution do increase cancer risk. But the biggest reason cancer is more common now is that people live longer. A 30-year-old in 1800 had a much lower chance of developing cancer simply because most people died of other causes first. Today, more people reach the ages when cancer becomes likely, so more cases occur.

How do we know what diseases ancient people had if we can't ask them?

Archaeologists examine skeletal remains for signs of disease, including bone tumors and other abnormalities. Ancient texts describe symptoms and treatments. Mummified remains sometimes preserve soft tissue, allowing direct observation of tumors. These sources together provide a picture of disease in ancient populations, though the picture is incomplete because many diseases leave no trace in bone or preserved tissue.

When did doctors first successfully treat cancer?

Surgery to remove tumors has been attempted for thousands of years, with variable success. Chemotherapy emerged in the 1940s and 1950s. Radiation therapy developed in the early 1900s. But these treatments were crude and often ineffective until the late 20th century, when better understanding of cancer biology allowed for more targeted approaches. Survival rates have improved dramatically since the 1980s for many cancer types.