EOD Primary Tumor

Notes

**Note 1:** **Islets of Langerhans** * Islets of Langerhans are distributed throughout the pancreas; an islet tumor is coded according to the subsite of the pancreas in which the tumor arises if the information is available. **Note 2:** **Abutment, encasement** * The terms "abutment," "abut(s)," "encases," or "encasement" of the major blood vessels can be interpreted as involvement of these structures.
Code Description SS2018 T
000 In situ: Noninvasive; intraepithelial - High-grade pancreatic intraepithelial neoplasia (PanIn-3) - Intraductal papillary mucinous neoplasm with high grade dysplasia - Intraductal tubulopapillary neoplasm with high grade dysplasia - Mucinous cystic neoplasm with high-grade dysplasia IS
100 Any size tumor - Confined to pancreas - Localized, NOS L
500 Any size tumor All sites - Ampulla of Vater - Duodenum - Extrahepatic bile duct(s) - Portal vein - Peripancreatic tissue, NOS - Stomach - Superior mesenteric vein Head of pancreas - Adjacent stomach - Gastroduodenal artery - Transverse colon, including hepatic flexure Body and/or tail of pancreas - Spleen - Splenic artery/vein - Splenic flexure Fixation to adjacent structure(s), NOS RE
600 Aortic artery Celiac [axis] artery Common hepatic artery Superior mesenteric artery Further contiguous extension to other major arteries RE
700 Adrenal gland/suprarenal gland Gallbladder Kidney Liver, including porta hepatis Mesenteric fat Mesentery Mesocolon Peritoneum Retroperitoneum Small intestine (excluding duodenum, see code 500) Ureter Further contiguous extension to other organs Head of pancreas - Colon (other than transverse colon including hepatic flexure, see code 500) - Omentum - Spleen Body and/or tail of pancreas with extension to - Colon (other than splenic flexure) - Diaphragm D
800 No evidence of primary tumor U
999 Unknown; extension not stated Primary tumor cannot be assessed Not documented in medical record Death Certificate Only U
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