STAGES OF BREAST CANCER

STAGES OF BREAST CANCER

The stages of breast cancer are classified based on tumor size, lymph node involvement, and metastasis.

* STAGE 0 (CARCINOMA IN SITU):

1. Non-invasive cancer cells in milk ducts or lobules.

2. No spread to surrounding tissue.

* STAGE I (EARLY INVASIVE):

1. Tumor ≤ 2 cm.

2. No lymph node involvement.

3. No distant metastasis.

* STAGE II (LOCALLY ADVANCED):

1. Tumor 2-5 cm.

2. Limited lymph node involvement.

3. No distant metastasis.

* STAGE III (REGIONALLY ADVANCED):

1. Tumor > 5 cm.

2. Extensive lymph node involvement.

3. No distant metastasis.

*STAGE IV (METASTATIC):

1. Cancer spread to distant organs (e.g., lungs, liver, bones).

2. Tumor of any size.

*SUB-STAGES:

- Stage IA: Tumor ≤ 2 cm, no lymph node involvement.

- Stage IB: Tumor ≤ 2 cm, limited lymph node involvement.

- Stage IIA: Tumor 2-5 cm, no lymph node involvement.

- Stage IIB: Tumor 2-5 cm, limited lymph node involvement.