Fig. 1

Radiotherapy plans for paraaortic–right common iliac lymph node metastasis. a Three-dimensional radiotherapy plan. Two anteroposterior beams and two lateral beams were used. The spinal cord, right kidney, part of stomach, liver, and adjacent small bowel were encompassed in the 50% isodose line. b Intensity modulated radiotherapy plan. The spinal cord, right kidney, stomach, liver, and small bowel were excluded from the 50% isodose line. Red (thick): 95% isodose line; blue (thick): 80% isodose line; sky-blue: 50% isodose line; blue (thin): planning target volume