The kitten in this photograph has diprosopia, a rare congenital malformation that duplicates facial features. 这张照片中的小猫所示的双面畸形，是一种罕见的先天性畸形，面部特征重复。
While genetic mutations cause some abnormalities in humans, many, including diprosopia, are caused by obstacles faced during development. 虽然人的遗传变异会导致一些畸形，但是，许多人，包括双面畸形是由发育期间面临的障碍引起的。
