Transverse section of CBCT of fraction number 28 for the presented patient. The outer surface contour is the CBCT contour. The interrupted contour is the planning CT (pCT) body contour. The developed edema is 11 mm on the right inguinal side (difference between pCT and CBCT contours). Red and yellow contours are GTV‐N on CBCT and pCT, respectively. The geographical shift of this LN from pCT to CBCT (center of mass) (“r”) was 10 mm. The depth of this LN from the skin was 9 mm on this CBCT