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triradius

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triradius
Dermatoglyphics A pattern of whorls seen on the palms of children with trisomy 13 and 21, a finding of itself without pathologic significance, which supports the diagnosis of these trisomies


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Finger ridge count is determined by drawing a line from the triradius (a point at which ridges come together forming a triangular configuration) through the center of the finger print pattern and counting each ridge which crosses the line.
 
 
 
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