trident hand

tri·dent hand

a hand in which the fingers are of nearly equal length and deflected at the first interphalangeal joint, so as to give a forklike shape; seen in achondroplasia.
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Mild enlargement of fingers were seen in the hand and in left hand there is a space between middle finger and ring finger--the trident hand. (6) The trunk appears to be normal in size for his age and the length of the trunk is more than the length of the lower extremity.