An Immunohistochemical Study on the Expression of Sex Steroid Receptors in Canine Mammary Tumors

Table 2

Distribution of ERα and PR in benign and malignant mammary tumors.

Tumor type	ERα+; PR+	ERα+; PR−	ERα−; PR+	ERα−; PR−	Total
Benign	—	—	6 (54.55%)	5 (45.45%)	11
Malignant	—	1 (5.56%)	9 (50%)	8 (44.44%)	18
Total	0	1	15	13	29