dhon_ parent
This man apparently had a lego piece stuck in his appendix for 40 years after swallowing it on a dare https://metro.co.uk/2005/02/17/lego-removed-from-body-591849...
A lithopedion…, or stone baby, is a rare phenomenon which occurs most commonly when a fetus dies during an abdominal pregnancy,[1] is too large to be reabsorbed by the body, and calcifies on the outside as part of a foreign body reaction. . .
This was a neat plot point on a tv show called the Beforeigners.