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What is the reason for an extra bone on one side of both the legs?

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Patient's Query

Hi doctor,

I am an 18-year-old male. My brother and I seem to have an extra bone on one side of both legs. I had this from my childhood, but there is no unique pain in it. Recently, I found that other people do not have that extra bone. Here is the picture for your reference. May I know the reason for this? Please explain.

Hi,

Welcome to icliniq.com.

The extra bone is a sesamoid bone called fabella or cyamella. These sesamoid bones are normal anatomical variants. They are nonfunctional in humans. They do not cause any symptoms unless there is a fracture or constant irritation of the region by external pressure causing sore or bursitis formation.

Thank you.

Answered byDr. Sumit Chawla

Medically reviewed byiCliniq medical review team

Published At September 8, 2016
Reviewed AtJuly 26, 2023

Same symptoms don't mean you have the same problem. Consult a doctor now!

Dr. Sumit Chawla
Dr. Sumit Chawla

Orthopedician and Traumatology

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