Fig. 4.

Histopathological examination, Hematoxylin and eosin (H&E) staining. A. Low-power of view (x5). reveals papillary structures and hemosiderin deposition in the papillary components and cyst wall. B. On high-power of view (x200), the papillary structures are lined by columnar or hobnail cells with clear cytoplasm and nuclei of various sizes, resulting in a diagnosis of clear cell carcinoma. C. On high-power of view (x100), endometrial glands and endometrial stroma are detected in the cyst wall, resulting in a diagnosis of endometriosis.