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December 4, 2025
What is the prognosis and treatment for stage T1b grade 3 ER positive, PR negative, HER2 negative breast cancer?
Your cancer is early-stage (T1b means a small tumor between 0.5-1 cm) with a generally favorable prognosis. Stage 1 breast cancer has excellent survival rates, with at least 99 percent of people surviving five Show Full Answer
What is the prognosis and treatment for stage T1b grade 3 ER positive, PR negative, HER2 negative breast cancer?
Your cancer is early-stage (T1b means a small tumor between 0.5-1 cm) with a generally favorable prognosis. Stage 1 breast cancer has excellent survival rates, with at least 99 percent of people surviving five years or more.
However, grade 3 tumors are more aggressive and grow faster than lower-grade tumors. Being ER positive means your cancer responds to estrogen, which is actually good news because it gives you more treatment options. The HER2 negative status means the cancer doesn't have excess HER2 protein.
Since you're ER positive but PR negative, you'll likely benefit from hormone therapy like tamoxifen or exemestane. These drugs block estrogen receptors to prevent cancer growth and reduce recurrence risk.
Your treatment will typically include:
* Surgery (lumpectomy or mastectomy)
* Possible radiation therapy
* Hormone therapy to reduce recurrence risk
* Chemotherapy may be considered due to the grade 3 status
ER-positive cancers can have a small risk of recurrence later (10+ years after treatment), so long-term follow-up is important. Your oncologist will create a personalized treatment plan based on all your specific factors.
December 3, 2025