Skyscape Web Viewer : TNM Cancer Staging System : Main Index

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N1a is defined as metastasis in one regional lymph node
N1b is described as one lymph node metastasis 5 mm or greater
N1 is defined as involvement of regional lymph nodes
N2a is defined as metastasis in 4 to 6 regional lymph nodes
N2b is described as two or more lymph node metastases 5 mm or greater
N2c is described as lymph node(s) with extranodal extension
N3 is described as fixed or ulcerated regional lymph node metastasis
Nasal cavity and paranasal sinuses prognostic factor risk assessment models primary tumor regional lymph nodes
National Cancer Database (NCDB),, 880, 903, 912 Anus Breast Intrahepatic Bile Ducts Merkel Cell Carcinoma Survival Data Appendix: Carcinoma Cervical Lymph Nodes and Unknown Primary Tumors of the Head and Neck Malignant Pleural Mesothelioma Stomach
National Comprehensive Cancer Network (NCCN) Colon and Rectum Introduction and Overview Neuroendocrine Tumors of the Appendix Neuroendocrine Tumors of the Duodenum and Ampulla of Vater Breast Neuroendocrine Tumors of the Pancreas Prostate Exocrine Pancreas Mucosal Melanoma of the Head and Neck Neuroendocrine Tumors of the Colon and Rectum Neuroendocrine Tumors of the Jejunum and Ileum Penis Thyroid: Medullary
N1a is described as one or two lymph nodes metastasis each less than 5 mm
N1 disease is defined as a single or multiple regional lymph node involvement
N1 is pelvic or inguinal lymph node metastasis
N2a is described as three or more lymph node metastases each less than 5 mm
N2b showing nodal masses in more than 7 regional lymph nodes
N2 is defined as in-transit metastasis (discontinuous from primary tumor; located between primary tumor and draining regional nodal basin, or distal to the primary tumor) without lymph node metastasis
Nasopharyngeal carcinoma (NPC)
National diabetes data group criteria
National lung screening trial (NLST)
Neuroendocrine tumors (NETs)
Neuro-oncology chemotherapy radiation therapy chemotherapy radiation therapy
New York Heart Association (NYHA)
NOAC
Non Hodgkin lymphoma (NHL) pediatric\|AJCC prognostic stage groups Lugano classification pediatric\|prognostic factors
Norepinephrine
North American Neuroendocrine Tumor Society (NANETS) Neuroendocrine Tumors of the Jejunum and Ileum Neuroendocrine Tumors of the Colon and Rectum
NPC
National lipid association guidelines
Natural history of GIST
New oral anticoagulation agents (NOAC)