Table 1

Clinical details

Patient	Sex	Age (y)	Duration of illness	Pain	Diarrhoea	Rectal bleeding	Weight loss	Previous history
1	F	56	Not stated	−	+	+	Nil	UC 16 years; on steroids
2	M	45	6/52	+	+	+	Nil	Nil
3	M	63	3 y	+	+	+	2–3 stones	UC 3 years; on steroids
4	F	57	3 y	+	+	+	Nil	Nil
5	F	75	1 y	+	+	+	1 stone	Nil
6	F	67	4 y	+	+	−	Not stated	Limited sigmoid resection for diverticulitis
7	F	82	6/12	−	+	+	2 stones	Peptic ulcer surgery
8	F	48	2/7	+	+	+	Nil	Nil
9	M	50	Not stated	+	+	+	Nil	Nil
10	F	75	Not stated	+	+	+	Nil	Nil
11	F	80	Not stated	+	+	+	Nil	Nil

UC, ulcerative colitis.