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

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

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.
Answered by Dr. Sumit Chawla

Education:

MBBS

Professional Bio:

Dr. Sumit Chawla is a skilled Orthopedician and Traumatology specialist with extensive years of clinical experience. He specializes in managing musculoskeletal injuries, fractures, and joint disorders with precision. His expertise spans both advanced surgical techniques and effective non-surgical treatments. Dr. Chawla is committed to delivering personalized care that restores mobility, enhances recovery, and improves patients’ quality of life.

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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.

Medically reviewed by iCliniq medical review team
Published At September 8, 2016
Reviewed At July 26, 2023

Education:

MBBS

Professional Bio:

Dr. Sumit Chawla is a skilled Orthopedician and Traumatology specialist with extensive years of clinical experience. He specializes in managing musculoskeletal injuries, fractures, and joint disorders with precision. His expertise spans both advanced surgical techniques and effective non-surgical treatments. Dr. Chawla is committed to delivering personalized care that restores mobility, enhances recovery, and improves patients’ quality of life.

This doctor is not available for online consultations on the platform anymore.

Consult other doctors in the same speciality

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

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Companion

Extra Bone in Legs Companion

How it works

Many people have small, extra bones in their body that are normal anatomical variations. Learn more about these sesamoid bones and when they might need attention.

1

Sesamoid
Bones

2

Sesamoid
Bones

3

The
Fabella

4

Normal
Variant

5

Potential
Problems

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One
Detail

This information is based on general medical guidance. It is not a substitute for professional medical advice; consult a qualified clinician.

Always consult a doctor before taking medication; self-medication carries serious health risks. Take exact prescribed doses, and never start, change, or stop treatment without medical supervision.
Dr. Sumit Chawla
Dr. Sumit Chawla

Orthopedician and Traumatology

Education:

MBBS

Professional Bio:

Dr. Sumit Chawla is a skilled Orthopedician and Traumatology specialist with extensive years of clinical experience. He specializes in managing musculoskeletal injuries, fractures, and joint disorders with precision. His expertise spans both advanced surgical techniques and effective non-surgical treatments. Dr. Chawla is committed to delivering personalized care that restores mobility, enhances recovery, and improves patients’ quality of life.

This doctor is not available for online consultations on the platform anymore.

Consult other doctors in the same speciality
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