while postaxial polydactyly showed a 33 % level of familial recurrence , symphalangism and kirner 's syndrome showed about 23 % recurrence , syndactyly 18 % , radioulnar synostosis 9 % , radial ray deficiency 8 % , cleft hand 7 % , and duplicated thumb 5 % .
C0018563
hand
C0040067
thumb