MY LIFE Matters - Health Literacy - 24

Breast Cancer Staging
STAGES AND WHAT THEY MEAN
Non-invasive tumor < 2 cm
Stage 0
Is used to describe non-invasive breast cancers, like DCIS, and
means the cancer cells are not outside the part of the breast in
which they formed and are not invading neighboring normal
and healthy �ssue.
Invasive tumor < 2 cm
Stage I
Is the first category for invasive breast cancer and is divided into
two subcategories:
Stage IA: The tumor is 2 cm or smaller and is not in the lymph nodes
Stage IB: There are small groups of cancer cells between 0.2 mm and
2 mm in the lymph nodes with either no tumor or a tumor up to 2 cm
Tumor is 2-5 cm
Stage II
Identifies invasive breast cancer and is divided into two subcategories:
Stage IIA: there is no tumor in the breast but cancer calls larger than
2 mm are in axillary lymph nodes (the lymph nodes under the arm)
or in the lymph nodes near the breast bone (found during a sen�nel
node biopsy); OR there is a tumor 2 cm or smaller in the breast and it
has spread to the axillary lymph nodes; OR the tumor in the breast is
between but not spread to the lymph nodes.
Stage IIB: There is a 2-5 cm tumor in the breast and small groups of
breast cancer cells between 0.2 mm and 2 mm in the lymph nodes
and/or cancer has spread to 1 to 3 axillary lymph nodes or to lymph
nodes near the breastbone; OR the tumor is larger than 5 cm but has
not spread to the axillary lymph nodes.
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