Full-thickness excision using transanal endoscopic microsurgery for treatment of rectal neuroendocrine tumors

Figure 1 Full-thickness excision of a rectal neuroendocrine tumor visible under transanal endoscopic microsurgery. A: The tumor and a clearance margin marked by coagulation dots using a needle electrode; B: After full-thickness excision with neat surgical margins; C: After suturing the rectal wall. The leakage from the suture line will be negligible; D: The neuroendocrine tumor removed completely with safe surgical margins.