Table 4.

Correlation between primary or secondary perianal Paget's diseases and immunophenotypes.

	Primary PPD (N = 10)	Secondary PPD (N = 13)	P valuea
CK7
Positive	7 (70.0%)	6 (46.2%)	0.402
Negative	3 (30.0%)	7 (53.8%)
CK20
Positive	6 (60.0%)	10 (76.9%)	0.650
Negative	4 (40.0%)	3 (23.1%)
CDX2
Positive	6 (60.0%)	12 (92.3%)	0.127
Negative	4 (40.0%)	1 (7.7%)
GCDFP-15
Positive	3 (30.0%)	0 (0.0%)	0.068
Negative	7 (70.0%)	13 (100.0%)

CRC: colorectal cancer. ^aP value was analyzed using the two-sided Fisher exact test.