Abstract
A eighteen-year-old boy clinically and roentgenographically examined, has striking abnormalities in feet. The distal interphalangeal joints of middle, ring and little toes of both feet are stiffened in the extended position. The skin over the affected joints is smooth and tense and has no volar creases and dorsal transverse wrinkles. X-ray examination has revealed that the boy has synostosis between the phalanx media and phalanx tertia.