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sesamoid bone
very cool, thanks for the edumacation
based on this, that wee lil floater off the 3rd metacarpal head is likely also a sesamoid bone
https://www.semanticscholar.org/paper/Distribution-of-Sesamoid-Bones-in-the-Hand%E2%80%94A-Study-Ting-San/983c6745f98ceb066c8c711cf4efab934f641917
seanile
Thumb little bone bit is called a sesamoid bone. It's not a break. The other areas are undisplaced fractures, just cracks but not needing of surgery. Just rest.. T