Bladder perforation during transurethral resection of bladder tumour is not a result of a deficient structure of the bladder wall

Table 3 Results of immunohistochemical analysis

			Group 1 (perforation)	Group 2 (no perforation)	P value (group 1 vs. group 2) *
Type IV collagen	Mean IRS score		3.24	2.20	0.49
	Percentage of positive cells	0	0%	1.8%
		1	26.9%	54.5%
		2	61.6%	38.2%
		3	11.5%	5.5%
		4	0%	0%
	Staining intensity	0	0%	1.8%
		1	53.8%	61.8%
		2	38.5%	29.1%
		3	7.7%	7.3%
Cytokeratin 20	Mean IRS score		8.16	7.18	0.91
	Percentage of positive cells	0	0%	10.9%
		1	19.2%	20.0%
		2	3.8%	5.4%
		3	61.6%	27.3%
		4	15.4%	36.4%
	Staining intensity	0	0%	10.9%
		1	15.4%	9.1%
		2	7.7%	20.0%
		3	76.9%	60.0%
Epithelial membrane antigen	Mean IRS score		2.84	2.11	0.41
	Percentage of positive cells	0	0%	25.5%
		1	26.9%	32.7%
		2	50.0%	34.5%
		3	23.1%	7.3%
		4	0%	0%
	Staining intensity	0	0%	25.5%
		1	61.5%	40.0%
		2	38.5%	21.8%
		3	0%	12.7%
E-cadherin	Mean IRS score		10.64	10.45	0.79
	Percentage of positive cells	0	0%	0%
		1	0%	0%
		2	3.8%	0%
		3	19.2%	45.5%
		4	77.0%	54.5%
	Staining intensity	0	0%	0%
		1	0%	0%
		2	15.4%	5.5%
		3	84.6%	94.5%
B-catenin	Mean IRS score		5.92	3.85	0.82
	Percentage of positive cells	0	7.7%	5.4%
		1	23.1%	16.4%
		2	15.4%	56.4%
		3	46.1%	14.5%
		4	7.7%	7.3%
	Staining intensity	0	7.7%	5.5%
		1	23.1%	32.7%
		2	11.5%	50.9%
		3	57.7%	10.9%

Percentage of positive cells: score of 0, no cells with positive reaction; 1, ≤ 10% cells with positive reaction; 2, 11 to 50% cells with positive reaction; 3, 51 to 80% cells with positive reaction; 4, > 80% cells with positive reaction
Staining intensity: 0, no colour reaction; 1, poor colour reaction; 2, moderate colour reaction; 3, intensive colour reaction
*Pearson’s chi-square test

ISSN: 1477-7819