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Fabella was rare in humans. Researchers have now reported that 39% of the world's population in 2018 was likely to have a knee. People with arthritis are twice as likely to have Fabella. ( pixabay )
Fabella, a small bone in the knee that was thought lost due to human evolution, is making a comeback. The researchers said that bone was becoming more and more common in humans and they did not know why.
Fabella: Skeleton Annex.
The fabella is buried in the tendon behind the knees. The bone, badociated with knee problems and pain, does not seem to have any important function.
Michael Berthaume, of the bioengineering department of Imperial College London, said that fabella could soon be known as the skeletal appendix.
"We do not know what fabella's job is – no one has ever looked at it," he said. "The fabella is a bone that has no apparent function and that causes pain and discomfort to some.It may be necessary to remove it if it causes problems . "
Fabella becomes more common
Fabella was formerly rare in humans, but there appears to be a resurgence of this tiny bone during the last century.
In a study published in the Journal of AnatomyBerthaume and colleagues reviewed 21,676 knee studies in more than 27 countries over a 150-year period.
The earliest recordings used in the badysis dated back to 1875 and showed that the knee bone was present only in 17.9% of the population. However, between 1918 and 2018, the number of fabella has more than tripled.
The researchers then created a statistical model to predict the prevalence rate of fabella. They discovered that in 1918, fabellae were present in 11.2% of the world's population, but that in 2018, 39% of the population probably have it, which represents an increase of 3.5 time.
More common in people with arthritis
The researchers said that bone is most prevalent among Asians and Australians. The bone is also more prevalent in people with arthritis. People with osteoarthritis of the knee are twice as likely to contract the disease.
Despite the fact that fabella is more common in people with knee problems, it is unclear if it causes arthritis. The researchers also said that bone could be an obstacle to knee replacement surgery.
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