Inclusion Criteria
Histologic documentation of women or men with node positive, HER2 negative, anatomic stage II or III breast carcinoma within one year of diagnosis and free of recurrence. If neoadjuvant therapy was received, either initial clinical stage (determined by physical and or radiologic examination) or post-operative pathologic stage can be used for eligibility purposes, with the higher stage determining eligibility. Histologic documentation of node positivity is required
Any ER/PgR status allowed
Prior adjuvant treatment with chemotherapy and/or endocrine therapy, as determined the treating physician, is allowed. The last dose of chemotherapy or radiation therapy must be at least 60 days prior to study registration. Concurrent hormonal therapy will be allowed
Regular NSAID/aspirin use (defined as ? 5 days per week) is allowed if aspirin and/or NSAIDs are stopped for one year prior to study entry and throughout the study period. Participants will be encouraged to use acetaminophen for minor pain and fever
Patients must be enrolled within 1 year after diagnosis
ECOG performance status 0-2
Patients with a prior history of gastric/duodenal ulcers documented on endoscopy can be enrolled as long as the ulcers did not cause bleeding requiring a blood transfusion/major intervention
For patients who are Helicobacter pylori positive, a course of Helicobacter pylori eradication treatment must have been completed
Concurrent enrollment on a non-chemotherapy treatment trial will be allowed, as long as that trial allows concurrent daily aspirin use
Exclusion Criteria
History of GI bleeding requiring a blood transfusion, endoscopic or operative intervention
History of any prior stroke (hemorrhagic or ischemic)
Concurrent anticoagulation with warfarin or heparin or clopidogrel or oral direct thrombin inhibitors
History of atrial fibrillation or myocardial infarction
History of grade 4 hypertension, defined as hypertension resulting in life-threatening consequences (e.g., malignant hypertension, transient or permanent neurologic deficit, hypertensive crisis)
Chronic (duration >30 days) daily use of oral steroids
Known allergy to aspirin
Prior malignancy of any type within the past 5 years other than breast cancer, basal or squamous cell carcinoma of the skin or carcinoma in situ of the cervix