Pancreato-hepatobiliary neuroendocrine tumors diagnosed through endoscopic ultrasound: Clinical characteristics and factors associated with high-grade lesions

Table 1 Extra-pancreatic lesions included in the detection of neuroendocrine neoplasms with upper gastrointestinal echoendoscope

	Region	Structures biopsied
1	Porta hepatis	Lymph nodal masses along inferior surface of liver
		Solid masses, distinct from liver along inferior surface of liver
2	Peri-gastric	Lymph nodal masses in areas anterior and lateral to stomach
		Solid peri-pancreatic or peri-splenic masses
3	Retroperitoneal	Lymph nodal masses posterior to stomach (excluding the pancreas), behind upper peritoneal cavity
		Para-aortic or para-caval masses
4	Hepatic	Lesions in left lobe of liver
5	Periampullary	Deep periampullary masses (not visible on luminal examination)
6	Mediastinal	Subcarinal, right or left hilar LNs (metastatic from subsequently biopsy proven malignant neuroendocrine PHB primary)

PHB: Pancreato-hepatobiliary; LN: Lymph node.