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Table 2 Dose statistics of different subvolumes inside the ano-inguinal lymphatic drainage (AILD) with two different radiation techniques

From: Dosimetric comparison of different radiation techniques (IMRT vs. 3-dimensional) of the “true” (deep) ano-inguinal lymphatic drainage of anal cancer patients

Structure Technique Dose (Gy) Volume (%)
Dmean Dmeadian D98% D2% V30Gy
AILDcranial 3D-RT 49,0 50,7 36,9 53,3 98,7
IMRT 47,3 49,5 33,6 51,9 98,5
p-value 0,008 0,008 0,075 0,008 0,236
AILDcaudal 3D-RT 34,7 35,4 11,3 52,3 66,5
IMRT 32,1 32,0 10,7 51,4 57,0
p-value 0,011 0,011 0,514 0,018 0,011
Level1 3D-RT 41,2 42,9 22,4 52,5 85,3
IMRT 39,5 40,4 21,6 51,6 81,0
p-value 0,013 0,015 0,285 0,011 0,110
Level2 3D-RT 36,5 37,4 15,4 51,9 73,4
IMRT 33,8 33,7 15,6 51,4 62,6
p-value 0,011 0,012 0,722 0,183 0,008
Level3 3D-RT 26,3 25,0 9,9 48,5 36,0
IMRT 22,3 20,1 9,5 44,4 25,2
p-value 0,011 0,015 0,813 0,173 0,011
  1. RT radiation therapy, AILD ano-inguinal lymphatic drainage, Gy gray, 3D 3 dimensional, IMRT intensity modulated radiation therapy
  2. Level1: 1 cm of AILD caudally of the anal verge, Level2: 1-2 cm of AILD caudally of the anal verge, Level3: 3 cm of AILD caudally of the anal verge
  3. Boldface indicates values that are statistically significant