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The key steps and techniques of ERBT based on TNM system. (A) Observe the interlace movement between tumor base and submucosa by pushing tumor base with monopolar current. (B) Make a small incision. (C) Blunt shear the whole mucosa and submucosa, and gradually reached to the deepest infiltration of tumor tissue. (D) Coagulate the blood supply arteries of the tumor. (E) Remove the tumor in one piece. (F) Take a cold cup biopsy.
