What is the smallest bone in the human body?
Stapes
The stapes appears to be relatively constant in size in different ethnic groups.[6] In 0.01-0.02% of people, the stapedial artery does not regress, and persists in the central foramen.[7] In this case, a pulsatile sound may be heard in the affected ear, or there may be no symptoms at all.[8]  Rarely, the stapes may be completely absent.[9][10]:262