Brachydactyly type A3
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- updated 11 May 2022:
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Brachydactyly type A3 is characterizedcharacterised by shortening of the middle phalanx of the little finger with radial deviation of distal phalanx. Slanting of the distal articular surface of the middle phalanx leads to radial deflection of the distal phalanx. However, it is not always associated with clinodactyly.
Epidemiology
Type A3 brachydactyly is quite common among Japanese adolescent population. Incidences variesvary from 4-21% in different populations.
Pathology
It is an autosomal dominant disorder like other subtypes of brachydactyly. However, no gene or locus for BDA3 has yet been identified.
-<p><strong>Brachydactyly type A3</strong> is characterized by shortening of the middle phalanx of the little finger with radial deviation of distal phalanx. Slanting of the distal articular surface of the middle phalanx leads to radial deflection of the distal phalanx. However, it is not always associated with <a href="/articles/clinodactyly">clinodactyly</a>.</p><h4>Epidemiology</h4><p>Type A3 brachydactyly is quite common among Japanese adolescent population. Incidences varies from 4-21% in different populations.</p><h4>Pathology</h4><p>It is an autosomal dominant disorder like other subtypes of <a href="/articles/brachydactyly">brachydactyly</a>. However no gene or locus for BDA3 has yet been identified.</p>- +<p><strong>Brachydactyly type A3</strong> is characterised by shortening of the middle phalanx of the little finger with radial deviation of distal phalanx. Slanting of the distal articular surface of the middle phalanx leads to radial deflection of the distal phalanx. However, it is not always associated with <a href="/articles/clinodactyly">clinodactyly</a>.</p><h4>Epidemiology</h4><p>Type A3 brachydactyly is quite common among Japanese adolescent population. Incidences vary from 4-21% in different populations.</p><h4>Pathology</h4><p>It is an autosomal dominant disorder like other subtypes of <a href="/articles/brachydactyly">brachydactyly</a>. However, no gene or locus for BDA3 has yet been identified.</p>
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