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Questions tagged [thumb]

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Thumb RCL reconstruction - Abductor Pollicis Brevis vs Palmaris Longus

Tearing the Radial Collateral Ligament in the thumb seems to be way less common than tearing the Ulnar Collateral Ligament in the thumb and so I'm having trouble finding relevant information on Google....
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What is the name for an underdeveloped MCP joint in the thumb?

Lets say a person is born with both thumbs unable to "bend" more than 5 degrees at the MCP joint (center or middle joint). This picture is of a thumb bending well over 45 degrees at the same joint.
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Is it normal for a bruise under a fingernail to move towards the end of the finger as the nail grows?

So in the middle of last month I accidentally jammed a running drill into my thumbnail. It hurt like a mother. It's left a bruise, which initially was touching the base of the nail. I noticed today ...