#hitchhiker's_thumb
Hitchhiker's thumb
Condition in which the thumbs can bend backwards 90°
Hitchhiker's thumb, also known as distal hyperextensibility of the thumb, is the condition of having a thumb that has a distal phalange that bends backwards in an angle of 90°. This condition is benign and does not cause pain or affect the thumb with the trait negatively.
Wed 3rd
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