Endometriosis is a common disease of women. In the present study, the expression of osteopontin (OPN), integrin αvβ3 and vascular endothelial growth factor (VEGF) in tissue of endometriosis were studied in order to investigate their functions and the clinical value. The result of the present study revealed that OPN was expressed in the gland epithelium cells, and the expression of OPN in ectopi...