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KMID : 0361619720070010167
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Journal of the Korean Orthopaedic Association
1972 Volume.7 No. 1 p.167 ~ p.170
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Pigmented Villonodular Synovitis
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Abstract
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Congenital clasped thumb is an unusal condition characterized by the thumb being held tightly beneath the flexed fingers in such a way that it cannot escape for normal prehension. New-born infants frequently hold their thumbs beneath their flexed fingers.
If the flexed thumb persists and normal independent action of the thumb does not develop third
or fourth month after birth, congenital clasped thumb is suggested.
It is the result of failure of normal development of the muscles and tendinous structures that
provide extension for the thumb and fingers at the metacarpophalangeal joint.
The deformity also includes volar soft tissue contractures of digits in varying degrees of severity. Since first description of Zadek in 1934 for bilateral thumb extensor agenesis. total 48 cases of
congenital clasped thumb have been reparted throughout the world.
A case of bilateral congenital clasped thumb with bilateral calcaneo-varus deformity in one month-old boy was diagnosed and treatment with prospect of complete funtional recovery.
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