Ureteral Ewing’s sarcoma in an elderly woman: A case report

Figure 2 Microscopic and pathologic images. A, B: Microscopic view of the left ureter tumor stained with hematoxylin and eosin. Histopathologic features suggested that it was a small cell malignant tumor of the left ureter; C-F: Immunohistochemical staining was positive for CD99 (C, D), transducin-like enhancer protein 1 (E), and Ki67 (F).