Strictures, diaphragms, erosions or ulcerations of ischemic type in the colon should always prompt consideration of nonsteroidal anti-inflammatory drug-induced lesions

Table 10 Frequency of histological findings in the four groups of patient

	Solitaryerosion	Solitaryulcer	Solitaryregenerativemucosa	Multipleerosions	Multipleulcers	Multipleerosions+ulcers	Multipleregenerativemucosa
NSAID (%)	23.7	76.3	13	36.5	46.6	10.8	6.1
	n = 27	n = 8	n = 17	n = 101	n = 129	n = 30	n = 17
ASA (%)	26.2	55.7	14.8	26.2	51	9.7	13.1
	n = 16	n = 34	n = 9	n = 16	n = 32	n = 6	n = 8
NSAID+ASA(%)	26.6	66.6	6.8	21.2	57.6	15.2	6
	n = 4	n = 10	n = 1	n = 7	n = 19	n = 5	n = 2
No	27.6	65.6	3.4	25.9	59.3	3.7	11.1
No NSAID/ASA
(%)	n = 16	n = 38	n = 2	n = 7	n = 16	n = 1	n = 3