The correct spelling of the sports injury commonly known as "pingpong bone" is actually "pinky bone" or the fifth metacarpal bone. The confusion in spelling may be due to its pronunciation IPA /ˈpɪŋki bəʊn/. This bone can be easily fractured in sports such as pingpong or boxing when the hand is subjected to sudden or heavy impact. It is important to seek medical attention immediately when experiencing pain, swelling, or difficulty in moving the hand or fingers.
The thin shell of osseous tissue covering a giant-cell sarcoma in a bone.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.