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  2. Hitchhiker's thumb - Wikipedia

    en.wikipedia.org/wiki/Hitchhiker's_thumb

    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 (when isolated) and does not cause pain or affect the thumb with the trait negatively. If a person has the genes for this condition, it might ...

  3. Hypermobility (joints) - Wikipedia

    en.wikipedia.org/wiki/Hypermobility_(joints)

    Rheumatology, Medical genetics. Hypermobility, also known as double-jointedness, describes joints that stretch further than normal. [2] For example, some hypermobile people can bend their thumbs backwards to their wrists and bend their knee joints backwards, put their leg behind the head or perform other contortionist "tricks".

  4. Ulnar collateral ligament injury of the thumb - Wikipedia

    en.wikipedia.org/wiki/Ulnar_collateral_ligament...

    Gamekeeper's thumb (also known as skier's thumb or UCL tear) is a type of injury to the ulnar collateral ligament (UCL) of the thumb. The UCL may be merely stretched, or it may be torn from its insertion site into the proximal phalanx of the thumb. [1] This condition is commonly observed among gamekeepers and Scottish fowl hunters, as well as ...

  5. Ulnar claw - Wikipedia

    en.wikipedia.org/wiki/Ulnar_claw

    An ulnar claw, also known as claw hand or ‘Spinster’s Claw’, is a deformity or an abnormal attitude of the hand that develops due to ulnar nerve damage causing paralysis of the lumbricals. A claw hand presents with a hyperextension at the metacarpophalangeal joints and flexion at the proximal and distal interphalangeal joints of the 4th ...

  6. Froment sign - Wikipedia

    en.wikipedia.org/wiki/Froment_sign

    Froment sign is the flexion of the interphalangeal joint of the thumb rather than adduction of the entire thumb. Note that the flexor pollicis longus is nearly always innervated by the anterior interosseous branch of the median nerve. Simultaneous hyperextension of the thumb MCP joint is indicative of ulnar nerve compromise.

  7. Acquired hand deformity - Wikipedia

    en.wikipedia.org/wiki/Acquired_hand_deformity

    Acquired hand deformity refers to the structural or functional abnormalities that develop in the hand. There are multiple varying causes of acquired hand deformity, triggering significant consequences and complications. Trauma, including blunt force, penetrating injuries, burns, and sports-related incidents, is a primary cause of acquired hand ...

  8. Ligamentous laxity - Wikipedia

    en.wikipedia.org/wiki/Ligamentous_laxity

    Ligamentous laxity. Ligamentous laxity, or ligament laxity, is a cause of chronic body pain characterized by loose ligaments. When this condition affects joints in the entire body, it is called generalized joint hypermobility, which occurs in about ten percent of the population, and may be genetic. Loose ligaments can appear in a variety of ...

  9. Trapeziometacarpal osteoarthritis - Wikipedia

    en.wikipedia.org/wiki/Trapeziometacarpal...

    Trapeziometacarpal osteoarthritis (TMC OA) is, also known as osteoarthritis at the base of the thumb, thumb carpometacarpal osteoarthritis, basilar (or basal) joint arthritis, or as rhizarthrosis. [3][1][2] This joint is formed by the trapezium bone of the wrist and the metacarpal bone of the thumb. This is one of the joints where most humans ...

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