SLIDE 52 New 8th edition AJCC staging system
Clinical Staging– N category cNx, regional lymph nodes cannot be clinically assessed (e.g. previously removed for another reason, body habitus) cN0, no regional lymph node metastasis by clinical or radiological evaluation cN1, clinically detected regional nodal metastasis cN2, in‐transit metastasis without lymph node metastasis cN3, in‐transit metastasis with lymph node metastasis Pathological Staging– N category pNx, regional lymph nodes cannot be assessed (e.g. previously removed for another reason) or not removed for pathological evaluation pN0, no regional lymph node metastasis detected on pathological evaluation pN1a(sn), clinically occult nodal metastasis identified
- nly by sentinel lymph node biopsy
pN1a, clinically occult regional lymph node metastasis following lymph node dissection pN1b, clinically or radiologically detected regional lymph node metastasis, pathologically confirmed pN2, in‐transit metastasis without lymph node metastasis pN3, in‐transit metastasis with lymph node metastasis
Harms et al. Ann Surg Oncol 2016