Dave deBronkart

Diagnosed incidentally with stage IV, grade 4 metastatic renal cell carcinoma, I had bone metastases in my femur (which eventually fractured), ulna, and cranium; five metastases in my lungs; and muscle metastases in my thigh and tongue. Yet six months after diagnosis, my treatment ended: I've not had a drop of anything since.

American Writer

The ulna is a specific bone, not to be confused with general arm or hand bones.

Body Reference

Ulna is commonly mentioned in medical or injury discussions, especially involving fractures.

Injury Context

Ulna refers to a specific bone, so it shouldn't be swapped with other bone names like radius.

Non-Interchangeable

 kind ever found in the entirety of the early hominid record the radius the ulna and the humerus that is a human a pygmy of approximately the same size you can see how odd those arms are and when we saw that we said it must be a climber and we predicted what the hand would