syndactylism

例句：

1. 1.He had a syndactylism in his left foot that required surgery.
   他的左脚有并指畸形，需要进行手术。
2. 2.The condition is characterized by the presence of multiple toes on one foot, often resulting in pain and difficulty walking.
   这种状况的特点是一只脚上有多个脚趾，常常导致疼痛和行走困难。
3. 3. Syndactylism can be caused by congenital abnormalities or injuries during childhood.
   并指畸形可能是先天性异常或童年时期的损伤导致的。