polydactyly

例句：

1. 1.The child has a rare polydactyly condition that affects his hands.
   这个孩子患有一种罕见的多指畸形，影响了他的双手。
2. 2. The polydactylism in the family is caused by a genetic mutation.
   家族中的多指畸形是由基因突变引起的。
3. 3.The polydactylism can be corrected surgically with amputation of affected fingers.
   多指畸形可以通过切除受影响的手指进行矫正手术。