Classification of Breast Masses


Stage 0

Tis

N0

M0

Stage I

T1a

N0

M0

Stage IIA

T0

N1

M0

T1a

N1

M0

T2

N0

M0

Stage IIB

T2

N1

M0

T3

N0

M0

Stage IIIA

T0

N2

M0

T1a

N2

M0

T2

N2

M0

T3

N1, N2

M0

Stage IIIB

T4

N0, N1, N2

M0

Stage IIIC

Any T

N3

M0

Stage IV

Any T

Any N

M1


aT1 includes T1mic





5.5 Summary



























































































Breast

Tis

In situ

T1

≤2 cm

T1mic

≤0.1 cm

T1a

>0.1–0.5 cm

T1b

>0.5–1 cm

T1c

>1–2 cm

T2

>2–5 cm

T3

>5 cm

T4

Chest wall/skin

T4a

Chest wall

T4b

Skin edema/ulceration, satellite skin nodules

T4c

Both 4a and 4b

T4d

Inflammatory carcinoma

N1

Movable axillary

pN1mi

Micrometastasis, >0.2 mm, ≤2 mm

pN1a

1–3 axillary nodes

pN1b

Internal mammary nodes with microscopic metastasis by sentinel node biopsy but not clinically apparent

pN1c

1–3 axillary nodes and internal mammary nodes with microscopic metastasis by sentinel node biopsy but not clinically apparent

N2a

Fixed axillary

pN2a

4–9 axillary nodes

N2b

Internal mammary clinically apparent

pN2b

Internal mammary nodes, clinically apparent, without axillary nodes

N3a

Infraclavicular

pN3a

≥10 axillary nodes or infraclavicular node(s)

N3b

Internal mammary and axillary

pN3b

Internal mammary nodes, clinically apparent, with axillary node(s) or >3 axillary nodes and internal mammary nodes with microscopic metastasis by sentinel node biopsy but not clinically apparent

N3c

Supraclavicular

pN3c
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Sep 12, 2016 | Posted by in BREAST IMAGING | Comments Off on Classification of Breast Masses
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