Once breast cancer has been diagnosed it is staged. This process often takes place both before and after breast cancer surgery. The stage given before surgery is called the clinical stage and it is based upon the information collected from the mammogram and other imaging tests.
Then, once the mass – and lymph nodes if necessary – are removed, the pathologist will examine them to provide a more definitive staging number. This is called the pathological stage.
Your UPMC Breast Care Center team will use this staging number to help guide your treatment plan.
A tool called the TNM system is used to stage your cancer. This system, which was updated in 2018, is used by the American Joint Committee on Cancer and takes into account the following measures:
If you were diagnosed with breast cancer prior to 2018, your tumor stage was classified using only the first three of these measures. The additional measures now provide specific information about the tumor that affects your prognosis.
As in the past, the staging system uses numbers or letters after the T, N and M to provide more details about these measures. Higher numbers mean the cancer is more advanced. Under the new system, the tumor stage also includes information about the tumor’s grade and ER, PR and Her2 status.
Tumor staging is complex, so it is best to speak with your doctor about your specific stage and what it means.
Question To Ask The Doctor About Your Diagnosis (PDF)
UPMC Pinnacle Breast Care Center
11 Sprint Drive
Suite C
Carlisle, PA 17015
Phone: 717-960-3360
Fax: 717-706-6709
PinnacleHealth Breast Care Center
Located at UPMC Hillman Cancer Center at the Rocco and Nancy Ortenzio Cancer Pavilion
2035 Technology Parkway
Suite 200
Mechanicsburg, PA 17050
Phone: 717-988-1450
Fax: 717-221-5544
PinnacleHealth Breast Care Center
Located at Medical Sciences Pavilion
4300 Londonderry Road
Suite 202
Harrisburg, PA 17109
Phone: 717-545-5000
Fax: 717-545-5002
Leader Surgical Associates-UPMC
Located at Outpatient Services at UPMC Memorial
1703 Innovation Drive
Suite 3136
York, PA 17408
Phone: 717-741-3449
Fax: 717-741-5496
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