The findings are reported in the academic journal PLOS.
The skeleton of the young adult male was
found by a Durham University PhD student in a tomb in modern Sudan in
2013 and dates back to 1200BC.
Analysis has revealed evidence of
metastatic carcinoma, cancer which has spread to other parts of the body
from where it started, from a malignant soft-tissue tumour spread
across large areas of the body, making it the oldest convincing complete
example of metastatic cancer in the archaeological record.
The researchers from Durham University
and the British Museum say the discovery will help to explore underlying
causes of cancer in ancient populations and provide insights into the
evolution of cancer in the past. Ancient DNA analysis of skeletons and
mummies with evidence of cancer can be used to detect mutations in
specific genes that are known to be associated with particular types of
cancer.
Even though cancer is one of the world’s
leading causes of death today, it remains almost absent from the
archaeological record compared to other pathological conditions, giving
rise to the conclusion that the disease is mainly a product of modern
living and increased longevity. These findings suggest that cancer is
not only a modern disease but was already present in the Nile Valley in
ancient times.
Lead author, Michaela Binder, a PhD
student in the Department of Archaeology at Durham University, excavated
and examined the skeleton. She said: “Very little is known about the
antiquity, epidemiology and evolution of cancer in past human
populations apart from some textual references and a small number of
skeletons with signs of cancer.
“Insights gained from archaeological
human remains like these can really help us to understand the evolution
and history of modern diseases.
“Our analysis showed that the shape of
the small lesions on the bones can only have been caused by a soft
tissue cancer even though the exact origin is impossible to determine
through the bones alone.”
The skeleton is of an adult male
estimated to be between 25-35 years old when he died and was found at
the archaeological site of Amara West in northern Sudan, situated on the
Nile, 750km downstream of the country’s modern capital Khartoum. It was
buried extended on his back, within a badly deteriorated painted wooden
coffin, and provided with a glazed faience amulet as a grave good.
Previously, there has only been one
convincing, and two tentative, examples of metastatic cancer predating
the 1st millennium BC reported in human remains. However, because the
remains derived from early 20th century excavations, only the skulls
were retained, thus making a full re-analysis of each skeleton, to
generate differential (possible) diagnoses, impossible.
Co-author, Dr Neal Spencer from the
Department of Ancient Egypt and Sudan at the British Museum, said: “From
footprints left on wet mud floors, to the healed fractures of many
ancient inhabitants, Amara West offers a unique insight into what it was
like to live there — and die — in Egyptian-ruled Upper Nubia 3200 years
ago.”
The skeleton was examined by experts at
Durham University and the British Museum using radiography and a
scanning electron microscope which resulted in clear imaging of the
lesions on the bones. It showed cancer metastases on the collar bones,
shoulder blades, upper arms, vertebrae, ribs, pelvis and thigh bones.
The cause of the cancer can only be
speculative but the researchers say it could be as a result of
environmental carcinogens such as smoke from wood fires, through genetic
factors, or from infectious diseases such as schistosomiasis which is
caused by parasites.
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