Fig. 4From: Ascending colon cancer with synchronous external iliac and inguinal lymph node metastases but without regional lymph node metastasis: a case report and brief literature reviewHistopathological examination demonstrated the tumor to be a well-differentiated adenocarcinoma (a). The enlarged external iliac and inguinal lymph nodes proved to be metastases of well-differentiated adenocarcinoma (H&E staining) (b), and by immunohistochemical examination, cytokeratin 7 was negative (c) and cytokeratin 20 (d) and CDX2 (e) were positive (these figures showed each staining of external iliac lymph node)Back to article page