Endoscopic submucosal dissection for large laterally spreading tumors involving the ileocecal valve and terminal ileum

Figure 2 Procedure. A: Endoscopic view through the distal attachment showing dissection with insulation-tip knife; B: Carefully check for bleeding throughout the ileocecal region; C: The ulcer bed of ileum after en-bloc endoscopic submucosal dissection; D: Stereomicroscopic view presenting the resected specimen, which pathology reported as a Is+IIa intramucosal cancer with tumor-free margins of 70 mm in diameter.