In this issue, Nix et al report a small trial comparing open and robotic radical cystectomy with pelvic lymphadenectomy [1]. The authors report the number of lymph nodes removed in a non-inferiority design as the primary end point. Thus, in a comparison of 20 versus 21 patients, we learn that the robotic pelvic lymphadenectomy is not inferior to the open technique in terms of numbers of lymph nodes retrieved.
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