Nodal Staging Flashcards
cN0
No evidence abnormal ln on exam or imaging
cN1
Mets to mobile ipsilateral level I/II axillary LN
Level I lateral to pec minor, level 2 deep to pec minor
cN1mi
Micrometastasis - larger than 0.2mm none larger than 2mm
cN2
Mets to fixed/matted ipsilateral level I/II LN
Or ipsilateral internal mammary artery nodes alone
cN2a
Mets to fixed/matted level I/II axillary LN
cN2b
Metastases to ipsilateral internal mammary LN alone
cN3
Mets to ipsilateral infraclavicular (level 3 axillary LN)
Or ipsilateral internal mammary LN and level I/II axillary LN
or ipsilateral SCF ln
cN3a
Mets to ipsilateral infraclavicular (axillary level III) LNs
cN3b
Mets to ipsilateral internal mammary LN AND level I/II axillary LN
cN3c
Mets to ipsilateral SCF Lymph nodes
pNx
Cannot be assessed eg not removed or previously removed
pN0
No evidence of mets or isolated tumour cells only
pN0(i+)
Isolated tumour cells only malignant tumour cell clusters none larger than 0.2mm
pN1
Micrometastases Or Mets to 1-3 axillary LN Or Clinically negative internal mammary nodes with metastases by sentinel LN biopsy
pN1mi
Micrometastases - larger than 0.2mm but none larger than 2mm
pN1a
Mets in 1-3 axillary LN, at least one larger than 2mm
pN1b
Mets (excluding isolated tumour cells) in isolated internal mammary sentinel node
pN1c
pN1a and pN1b
pN2
Mets in 4-9 axillary LN
OR
Clinically positive internal mammary node with absence of axillary LN mets
pN2a
Mets in 4-9 axillary LN (at least one greater than 2mm)
pN2b
Mets to ipsilateral internal mammary LN by imaging (with or without microscopic confirmation) with pathologic negative axillary LN
pN3
Mets to 10 or more axillary LN OR Infraclavicular (level 3 axillary) LN OR Clinically positive ipsilateral internal mammary nodes PLUS positive level I/II axillary nodes OR More than 3 axillary LN AND positive sentinel LN biopsy in clinically negative internal mammary LN OR SCF LN
pN3a
Mets to 10 or more axillary LN
OR
Level 3 axillary (infraclavicular LN)
pN3b
pN1a or pN2a PLUS cN2b (positive internal mammary node by imaging)
OR
pN2a PLUS pN1b
pN3c
Mets to ipsilateral SCF LN
