Fig. 3

Postoperative pathological examination. Microscopic examination of the intestinal tumor demonstrated a full-thickness wall of sigmoid colon and serosa, and the muscular layer of the terminal ileum had metastatic squamous cell carcinoma. Cancer embolus was seen in the vessel, and the peri-intestine lymph node also had metastatic squamous cell carcinoma. a small intestine and b sigmoid colon (staining with hematoxylin and eosin, ×100 magnification)