Stages of breast cancer and what they mean


The stages of breast cancer are decided by the cancer’s characteristics, such as its size and whether or not it has hormone receptors. This helps determine treatment options and prognosis.

The best breast cancer surgery doctor in Kolkata explains the different stages of breast cancer.


Stages of breast cancer


The stages range from 0 to IV and higher stages show a more advanced disease. Staging may be done either before or after a patient undergoes surgery. Staging done before surgery is referred to as the clinical stage and staging done after surgery is known as the pathologic stage. Here is a summary of the stages and what they exactly mean: 


  • Stage 0 (carcinoma in situ):

This stage refers to non-invasive breast cancer. The abnormal cells are restricted to the ducts or lobules of the breast. The cancer cells have not yet spread beyond the original location and are not considered invasive.


  • Stage IA

The tumour is tiny, invasive and has not spread to the lymph nodes.


  • Stage IB

Cancer has spread to the lymph nodes. The cancer present in the lymph node is bigger than 0.2 mm but smaller than 2 mm in size.

Visit the Best Cancer Hospital in North Kolkata in case you observe any signs of breast cancer.

  • Stage IIA

The tumour is larger compared to stage I but still confined to the breast or it may be smaller but has spread to nearby lymph nodes.

  • Stage IIB

The tumour may be larger compared to stage IIA and has spread to nearby lymph nodes or it may be a smaller tumour with more extensive lymph node involvement.

  • Stage III

It is considered locally advanced, meaning it has extended beyond the breast and nearby lymph nodes.

  • Stage IV

It indicates that cancer has spread to other regions of the body, like the bones, liver, lungs or brain.


The best breast cancer surgery doctor in Kolkata ensures successful outcomes for every patient.

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