Stage IIA and IIB

Tumor less than 2 cm and/or lymph nodes under the arm involved (IIA) OR
Tumor greater than 2 cm but less than 5 cm and lymph nodes involved (IIB) OR
Tumor greater than 5 cm but no lymph nodes involved (IIB)

Modified radical mastectomy; radiation after mastectomy may be needed

OR

Lumpectomy plus radiation, in some cases following chemotherapy to shrink a large single cancer

Axillary lymph nodes removed by traditional approach

OR

Sentinal approach (for people without enlarged nodes)

AND

Possible radiation to supraclavicular and/or internal mammary lymph nodes

Commonly recommended

Used for people with hormone-receptor-positive cancer

May be used for people with cancers that have certain characteristics (for example, cancers with too many HER2 protein receptors)

Does not apply