Fig. 3

E-cadherin expression in eutopic and ectopic endometrial tissue by immunohistochemistry (× 200). a E-cadherin expression in eutopic endometrial tissue from woman without endometrioma revealing strong staining in glandular epithelium (dark brown, score 3). b E-cadherin expression in ectopic endometrial tissue from woman with endometrioma revealing staining in some columnar cells (light brown, score 1). g, endometrial gland; s, endometrial stroma