RT Journal Article SR Electronic T1 Dermatoglyphs of Klinefelter's syndrome. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 187 OP 189 DO 10.1136/jmg.14.3.187 VO 14 IS 3 A1 Shiono, H A1 Kadowaki, J A1 Tanda, H A1 Hikita, M YR 1977 UL http://jmg.bmj.com/content/14/3/187.abstract AB The dermatoglyphs of 28 Japanese with Klinefelter's syndrome [24 XXY; 2 XXYY; 1 XXXY; 1 XXXXY] were compared with 544 male and 129 female controls. These patients showed high frequencies of fingertip arches pattern, right third interdigital loops, right hypothenar patterns (Lr) and line C terminating 0 in the right hand. The mean summed a-b ridge count of Klinefelter's syndrome patients was significantly lower than that of the male controls. We suggest that an increase in the number of X or Y chromosomes decreased the a-b ridge count in a similar way to the decrease in total finger ridge count.