Table 2.

CDX2, MDR1 immunohistochemical staining in epithelial ovarian cancers

Histological typeDifferentiation degree (n = 53)		CDX2 (%)+	MDR1 (%)+
Ovarian mucinous adenocarcinoma (n = 14)	Well‐differentiated (n = 6)	6/6 (100)	6/6 (100)
	Moderately differentiated (n = 1)	1/1 (100)	1/1 (100)
	Poorly differentiated (n = 7)	0/7 (0)	2/7 (28.5)
Ovarian serous adenocarcinoma (n = 13)		0/13 (0)	5/13 (38.5)
Ovarian endometrioid adenocarcinoma (n = 11)		1/11 (9)	1/11 (9)
Ovarian clear cell carcinoma (n = 15)		0/15 (0)	6/15 (40)

Positive (+): >50% of tumor cells stained.

Well‐differentiated: Ratio of solid growth part 0–5%.

Moderately differentiated: Ratio of solid growth part 5–50%.

Poorly differentiated: Ratio of solid growth part 50–100%.