What is the difference between ulcerative colitis and ulcerative proctitis?
Nov 06, 2021
Source: Cainiu Health
Introduction
Ulcerative colitis is classified into three types based on the anatomical extent of disease involvement:
- **Proctitis**: disease confined to the rectum;
- **Left-sided colitis**: involvement of the left colon distal to the splenic flexure, including the descending and sigmoid colon;
- **Extensive (or pancolitis)**: involvement extending proximal to the splenic flexure, potentially affecting the entire colon.
Thus, ulcerative proctitis represents only one subtype of ulcerative colitis, and this classification aids in selecting appropriate therapeutic agents.
Ulcerative colitis is classified into three subtypes based on the anatomical extent of disease involvement: (1) proctitis—disease confined to the rectum; (2) left-sided colitis—involving the left colon distal to the splenic flexure, including the descending colon, sigmoid colon, and rectum; and (3) extensive (or pancolitis)—involving the colon proximal to the splenic flexure, potentially extending to the entire colon.

Thus, ulcerative proctitis represents merely one subtype of ulcerative colitis, and this classification aids in selecting appropriate therapeutic agents.