The swallowed chicken fibula became lodged in the appendix, leading with its blunt tip. The sharp tip of the broken fibula (its anatomical tip is even sharper) can be seen outside the appendiceal wall.

The radiologist warned the surgeons in advance to take care not to be pricked by the tip of the bone and was given extra credit post-surgery for having identified the avian bone on CT.

Interestingly, when a pin or sewing needle is swallowed, the leading tip is usually the blunt one (also from personal experience of having reported dozens of such cases).