Flexion finger deformity

The deformities are: 1. The flexion deformity often occurs in the little finger, occasionally involving the ring finger, and more than half are bilateral. 2. Flexion often occurs in the proximal interphalangeal joints, with metacarpophalangeal joints or wrist antagonism. 3. Finger flexion occurred progressively before the age of 10, often with a family history, which was not obvious at first, but gradually became more serious and was valued by parents. 4. Often accompanied by other systemic syndromes such as doun syndrome, klinefelfer syndrome, and several common facial syndromes, accompanied by skew deformities. 5. The main manifestation is the shortening of the superficial flexor fingers, the cause of the deformity is unclear, and it is mostly caused by the irregular start of the superficial muscles, which can start from the superficial flexor fingers or vermiform muscles. Often accompanied by skin shortening, the extension of fingers is also limited.

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