Hand dermatoglyphics in trisomy 4p.

A dermatoglyphic analysis of the hands of 16 patients with trisomy for the short arm of chromosome 4 has revealed an increased frequency of whorl patterns on fingertips, presence of axial triradii in position t' on palms and an increase of the main line index. Although of little diagnostic value these changes must be included in the constellation of major signs which characterize the 4p trisomy syndrome.