Fig. 3From: Extra-uterine low grade endometrioid stromal sarcoma arising from ovarian endometriosis: a case report and review of the literaturea (Endometriosis): a focus of regular dilated endometrioid glands embedded in the tumor (Hematoxylin and eosin stain × 200). b: At the peripheral ovarian parenchyma, a tongue-like protrusion in the vessel walls is seen (Hematoxylin and eosin stain × 100)Back to article page