What are the five colonic polyposis syndromes seen in children?

1. Familial polyposis (polyps at puberty)
2. Juvenile polyps
3. Juvenile gastrointestinal polyposis (familial) inflammatory polyps
4. Gardner’s syndrome (polyposis accompanied by osteomas, soft tissue fibromas, and sebaceous cysts)
5. Peutz-Jegher syndrome (polyps primarily in jejunum; hamartomatous polyps)