TNM Staging:
T (Size)
TX - Tumor cannot be measured or found
T0 - No evidence of primary tumor
Tis - in situ
T1 T2 T3 T4 - Increasing T number = Increasing size of tumor and/or greater extent of growth into neighboring breast tissue
N (LN)
NX - Nearby LN cannot be measured or found
N0 - Nearby LN do not contain cancer
N1 N2 N3 - Based on #LN involved and how much cancer found in them - Increasing N number = Greater extent of lymph node involvement
M (Metastasis)
MX - Metastasis cannot be measured or found
M0 - No distant metastasis
M1 - Distant metastasis is present
(Breastcancer.org stages 2015)
MALIGNANT BREAST DISORDERS:
Invasive Ductal Cancer (IDC)
Breast Cancer Stages:
I
Tumor < 2 cm with no spread outside the breast
No tumor found in breast but micrometastatic LN involvement
Tumor < 2 cm with micrometastatic LN involvement
II
No tumor found in breast but cancer spread to 1-3 nearby LN
Tumor < 2cm with axillary LN involvement
Tumor > 2cm and > 5cm with no/micrometastatic axillary LN involvement
Tumor > 2cm and > 5cm with spread to 1-3 nearby LN
Tumor > 5cm with no LN involvement
III
Tumor any size with spread to 4-9 nearby LNs
Tumor > 5cm with micrometastatic LN involvement
Tumor > 5cm with spread to 1-3 nearby LN
Tumor any size that has spread into chest wall and/or skin of breast and caused swelling or ulceration +/- spread to up to 9 axillary LN +/- spread to LN near breastbone
Tumor any size with spread to 10+ axillary LN +/- spread to chest wall and/or skin of the breast +/- spread to LN above or below the collarbone +/- spread to LN near the breastbone
IV
Distant metastases (Bone, liver, lungs, brain, skin, distant LN)
(Breastcancer.org stages 2015)