<a href="https://en.wikipedia.org/wiki/Projectional_radiography" class="extiw" title="en:Projectional radiography">X-ray</a> of the ankle of a 97 year old man who escaped from a retirement home on a powered wheelchair but drove into a ditch, resulting in a gash on his left lower leg. The image shows a 2 x 1 cm long fragment posterior to the <a href="https://en.wikipedia.org/wiki/medial_malleolus" class="extiw" title="en:medial malleolus">medial malleolus</a>, presumably from the <a href="https://en.wikipedia.org/wiki/calcaneus" class="extiw" title="en:calcaneus">calcaneus</a>. It looks corticalized, indicating it was caused by an injury far earlier in life.
<a href="//commons.wikimedia.org/wiki/User:Mikael_H%C3%A4ggstr%C3%B6m" title="User:Mikael Häggström">Mikael Häggström</a>
<span class="int-own-work" lang="en">Own work</span>