Congenital ulnar-radial connection

This is a more common congenital malformation of the upper limbs, about 60% of which is bilateral. Because the children's motor function is not well developed, and the reduction or disappearance of the disease's rotational function is limited to the forearm, patients are often not detected in time, so neonatal and infant cases are rarely seen. Patients are mostly in the early childhood of 4 to 5 years. Due to the lack of movement, the pronation position of the hand is fixed, and the supination activity disappears.

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