Table 1.

Typical characteristics of ulcerative colitis and bowel inflammation associated with PSC [9–11].

	Ulcerative colitis (typical features)	Bowel inflammation associated with PSC
Site of inflammation	Inflammation spreads continuously from the rectum	Inflammation predominantly affects the right colon
Backwash ileitis	No	Yes
Rectal sparing	No	Yes
Distribution of inflammation	Diffuse	Patchy
Severity of inflammation:
Mild	67%	76%
Moderate	29%	24%
Severe	4%	0%
Symptoms	Mucous/bloody stools, discomfort, etc.	None or mild symptoms