Table III.

CTV for gallbladder carcinoma.

Delineation type	JSHBPS classification	Recommended margins
Tumor delineation
Gallbladder carcinoma	–	GTV + 25 mm radially in hepatic direction + gallbladder residual volume
Lymph node group, nodes delineation
Hepatoduodenal ligament lymph nodes	12	10 mm margin around the segment of portal vein from the confluence between the right and left hepatic ducts and the upper border of the pancreas
Common hepatic artery lymph nodes	8	10 mm margin around the common hepatic artery
Para-aortic lymph nodes	16	10 mm margin around the abdominal aorta, from the diaphragmatic aortic hiatus to the upper border of the origin of the inferior mesenteric artery
Posterior pancreaticoduodenal lymph nodes	13	10 mm around the posterior pancreaticoduodenal artery
Anterior pancreaticoduodenal lymph nodes	17	10 mm margin around the anterior pancreaticoduodenal artery
Peri-choledochal nodes	12b2	10 mm margin around the choledochal duct
Cystic duct lymph nodes	12c	10 mm around the cystic duct

Lymph node nomenclature is based on the 3rd English Edition of Classification of biliary tract cancers established by the JSHBPS. The anatomical structures of interest and the abdominal vessels of reference were identified for each lymph node region. JSHBPS, Japanese Society of Hepato-Biliary-Pancreatic Surgery; CTV, clinical target volume; GTV, gross tumor volume.