The positive staining for progesterone receptor (PR), estrogen receptor (ER), and vimentin (VIM), alongside negative markers such as P40, GATA3, and CK20, supported the diagnosis of endometriosis by highlighting its hormonal dependency and mesenchymal origin, while excluding epithelial malignancies such as urothelial carcinoma. Here, GATA3 is linked to urothelial carcinoma.