Types of colonic polyp

Colonic polyps may be: (1)

• neoplastic:
  • adenomas - single or associated with familial polyposis syndrome
    
    
• hamartomatous:
  • juvenile - singly and as a juvenile polyposis syndrome
  • Peutz-Jegher's - singly and as part of Peutz-Jegher's syndrome
    
    
• hyperplastic
  
  
• reactive:
  • inflammatory polyps - associated with inflammatory bowel disease and ulcerative colitis more than Crohn's disease
  • lymphoid

Reference

1. Rex DK, Boland CR, Dominitz JA, et al. Colorectal cancer screening: recommendations for physicians and patients from the U.S. Multi-Society Task Force On Colorectal Cancer. Am J Gastroenterol. 2017 Jul;112(7):1016-30.