It is categorized into three subgroups based on clinical presentation: generalized juvenile polyposis, juvenile polyposis coli, and juvenile polyposis of infancy.

• 依据临床表现，幼年型息肉症区分成三类：散发性幼年型息肉症，大肠幼年型息肉症，婴儿期幼年型息肉症。