SLIDE 5 PBPS and AJCC 8th Ed Update for USCAP 2016 5/10/2016 5
Pancreas – PanNET: Summary of Changes
Change Details of Change New Chapter This staging system was included in the Exocrine and Endocrine Pancreas chapters in previous editions Anatomic Stage and Prognostic Groups Pancreatic neuroendocrine tumors are now staged using a TNM staging system that is predominantly based on size, with elimination of the criterion of peripancreatic soft tissue invasion. Definition of Primary Tumor (T) The Tis distinction has been eliminated M1a, M1b, M1c
Pancreas – PanNET: New T
T Category T Criteria TX Primary tumor cannot be assessed T1 Limited to the pancreas*, <2 cm T2 Limited to the pancreas*, 2‐4 cm T3 Limited to the pancreas*, >4 cm, OR invading duodenum or bile duct T4 Tumor invading adjacent organs (stomach, spleen, colon, adrenal gland) or the wall of large vessels (celiac axis or the superior mesenteric artery)
Multiple tumors should be designated as such (the largest tumor should be used to assign T category): If the number of tumors is known, use T (#), e.g. pT3 (4)N0M0. If the number of tumors is unavailable or too numerous, use m suffix, T(m), e.g. pT3(m)N0M0 * Limited to the pancreas means there is no invasion of adjacent organs (stomach, spleen, colon, adrenal gland) or the wall of large vessels (celiac axis or the superior mesenteric artery). Extension of tumor into peripancreatic adipose tissue is NOT a basis for staging.
≤ 2cm for PDAC
Pancreas – PanNET: New N
N Category N Criteria TX Regional lymph nodes cannot be assessed N0 No regional lymph node involvement N1 Regional lymph node involvement M Category M Criteria M0 No distant metastasis M1 Distant metastases M1a Metastasis confined to liver M1b Metastases in at least one extrahepatic site (e.g. lung, ovary, non‐ regional lymph node, peritoneum, bone) M1c Both (hepatic and extrahepatic metastases)
Pancreas – PanNET: New M
Ampulla: Summary of Changes
Change Details of Change T1 T1 tumors have been subdivided into T1a and T1b: T1a Tumor limited to ampulla of Vater or sphincter of Oddi, and T1b Tumor invades beyond the sphincter of Oddi (perisphincteric invasion) and/or into the duodenal submucosa T2 The T2 definition has been revised to define T2 as invasion into the muscularis propria of the duodenum T3 T3 tumors have been subdivided into T3a and T3b. T3a Tumor directly invades pancreas (up to 0.5 cm) T3b Tumor extends more than 0.5 cm into the pancreas; or Extends into peripancreatic or periduodenal tissue or duodenal serosa but without involvement of the celiac axis or the superior mesenteric artery T4 The T4 definition has been revised to be consistent with the staging system for exocrine pancreas: Tumor with vascular involvement of the superior mesenteric artery or celiac axis, or portal venous involvement that cannot be reconstructed (consistent with pancreas staging) N1 1‐3 positive regional lymph nodes N2 Metastasis to ≥ 4 regional lymph nodes