OBJECTIVES: * Compare 1-year mammographic density in premenopausal women at high risk for developing breast cancer treated with celecoxib vs placebo. * Compare 1-year proliferation of breast epithelial cells, as measured by Ki67 staining, in patients treated with these drugs. * Compare the expression of other biomarkers, including cyclo-oxygenase-2 (COX-2) enzyme and a marker of apoptosis, in breast tissue of patients treated with these drugs. * Compare 1-year plasma levels of insulin-like growth factor (IGF)-1, IGF binding protein-3, and prostaglandin E_2 in patients treated with these drugs. * Compare the toxicity of these drugs in these patients. OUTLINE: This is a randomized, placebo-controlled, double-blind, multicenter study. Patients are stratified according to risk category (lobular carcinoma in situ or ductal carcinoma in situ vs BRCA1/2 mutation AND any Gail risk vs Gail risk ≥1.7% but < 5% vs Gail risk ≥ 5%) and prior tamoxifen use (yes vs no). Patients are randomized to 1 of 2 treatment arms. * Celocoxib: Patients receive oral celecoxib twice daily. * Placebo: Patients receive oral placebo twice daily. In both arms, treatment continues for 12 months in the absence of unacceptable toxicity or diagnosis of cancer. Patients are followed at 1 month. PROJECTED ACCRUAL: A total of 100 patients (50 per treatment arm) will be accrued for this study.
DISEASE CHARACTERISTICS: * At elevated risk of developing breast cancer, as defined by 1 of the following: * Modified Gail risk at 5 years ≥ 1.7% or lifetime risk ≥ 20% AND Claus Model, BRCAPro Model, or Tyrer-Cuzick Model lifetime risk ≥ 20% * Diagnosis of lobular carcinoma in situ or ductal carcinoma in situ * Known deleterious mutation of BRCA1 or BRCA2 * At least 1 breast available for imagery and biopsy * Has undergone a baseline mammogram with a standard density wedge within 7-14 days after completion of the last menstrual period AND within 7 days before study entry * Mammogram normal or benign (BIRADS score 0 or 1) * Hormone receptor status: * Not specified PATIENT CHARACTERISTICS: Age * 18 and over Sex * Female Menopausal status * Premenopausal, defined by 1 of the following criteria: * Last menstrual period \< 6 months ago AND no prior bilateral ovariectomy AND not on estrogen replacement therapy * Prior hysterectomy (with ovaries still in place) AND normal follicle-stimulating hormone levels within 28 days of study entry Performance status * Zubrod 0-1 Life expectancy * Not specified Hematopoietic * Not specified Hepatic * Bilirubin \< 2.0 times institutional upper limit of normal (IULN) * SGOT or SGPT \< 2 times IULN * Alkaline phosphatase \< 2 times IULN * INR ≤ 1.5 * PT and PTT ≤ IULN Renal * Serum creatinine \< 2.0 times IULN Cardiovascular * No history of myocardial infarction * No angina pectoris * No known coronary artery disease * No history of stroke or mini-stroke (e.g., transient ischemic attack) * No history of thromboembolic disease (e.g., deep vein thrombosis or pulmonary embolism) * No uncontrolled hypertension (i.e., blood pressure \> 140/90 mmHg) Pulmonary * No asthma after taking aspirin or other NSAIDs Other * No known sensitivity to celecoxib * No allergy to sulfonamides * No urticaria or allergic-type reactions after taking aspirin or other NSAIDs * No extreme lactose intolerance * No other malignancy within the past 5 years except adequately treated basal cell or squamous cell skin cancer, carcinoma in situ of the cervix, or early bladder cancer (preinvasive transitional cell carcinoma of the bladder) * Not pregnant or nursing * Fertile patients must use effective contraception PRIOR CONCURRENT THERAPY: Biologic therapy * More than 5 years since prior biologic therapy for cancer Chemotherapy * More than 5 years since prior chemotherapy for cancer Endocrine therapy * At least 28 days since prior tamoxifen * No prior systemic estrogen modifiers (SERMs) or aromatase inhibitors * Concurrent hormonal contraception (i.e., pills, patches, or shots) allowed provided contraception was initiated prior to study entry Radiotherapy * No prior radiotherapy to the breast to be studied Surgery * Not specified Other * At least 7 days since prior anticoagulant therapy * More than 1 month since prior chronic daily aspirin or nonsteroidal anti-inflammatory drugs (NSAIDs) of more than 7 days duration * Concurrent intermittent aspirin or NSAIDs allowed (no more than 10 days per month) * No concurrent participation in another clinical trial for treatment or prevention of cancer unless no longer receiving treatment and is in the follow-up phase
are designated in this study
of being blinded to the placebo group