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

Table 9 Age and sex distribution, location of lesions in right colon, and histological findings in the four groups of patients

	n	F:M	Age (yr)	Locationright colon	Endoscopicsolitary lesion	Endoscopicmultiple lesions	Endoscopicstricture	Endoscopicdiaphragm
	356	251:105	63±35	71.2%	36.80%	63.2%	15.40%	3.6%
NSAID	58.3%	2.4:1	28-98	n = 131	n = 225	n = 55	n = 13
	122	75:47	56.5±33.5	76.8%	50%	50%	12.30%	0.8%
ASA	20%	1.6:1	23-90		n = 61	n = 61	n = 15	n = 1
	48	39:9	68±21	80.8%	31.2%	68.8%	25%	2.10%
NSAID+ASA	7.8%	4.3:1	47-89		n = 15	n = 33	n = 12	n = 1
	85	50:35	54.5±35.5	75.60%	68%	31.8%	8.20%	1.2%
No NSAID/ASA	13.9%	1.4:1	19-90		n = 58	n = 27	n = 7	n = 1