Abstract
An eighteen-year-old boy of Japanese clinically and roentgenographically examined, has striking abnormalities in hands and feet. There are no dorsal transverse wrinkles at the distal interphalangeal joint areas of 2nd, 3rd, 4th and 5th fingers of both hands and at the proximal interphalangeal joint area of 5th finger of left hand. Volar creases are not found also at the distal interphalangeal joint areas of 2nd, 3rd and 4th fingers of both hands. X-ray examination has revealed that the joint cavities of the affected joints are narrow (Synchondrosis) and the Range of Motion (ROM) are also limited. At the proximal and distal interphalangeal joint areas of all toes of both feet, there aren't transverse wrinkles. The proximal interphalangeal joints of 4th and 5th toes of left feet and the distal interphalangeal joints of 5th toes of both sides showed the Synchondrosis by X-ray examination.Limitation of the RUM is observed at the distal interphalangeal joint flexion of the 1st, 2nd and 3rd toes of both sides and proximal interphalangeal joint flexion of the 4th toes of both feet. Analysis of chromosome of the leucocytes in peripheral blood shows normality.Existence of the heredity in this family was not definite, but the patient told us that behavier of his father and cousins showed to be Symphalangism.
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