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TrialConditionsStatusPhaseUpdatedMore infoNCT ID
Decision Making Tool in Supporting Decision Making in Contralateral Prophylactic Mastectomy in Patients With Newly Diagnosed Breast CancerNeoplasms by Histologic Type, Neoplasms, Ductal, Lobular, and Medullary, adenocarcinoma, breast carcinoma in situ, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, invasive breast carcinoma, neoplasm, sporadic breast cancerRecruitingNot applicable2026-10-09NCT02918474
Metformin Hydrochloride in Preventing Breast Cancer in Patients With Atypical Hyperplasia or In Situ Breast CancerNeoplasms by Histologic Type, Neoplasms by Site, Neoplasms, Ductal, Lobular, and Medullary, Skin and Connective Tissue Diseases, adenocarcinoma, breast carcinoma in situ, breast disorder, breast neoplasm, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasm, skin disorderActive, not recruitingPhase 32026-10-08NCT01905046
Impact of COVID-19 Pandemic on Out-of-Pocket Costs, Lost Wages, and Unemployment in Patients With Breast Cancer Undergoing Breast SurgeryCOVID-19, Coronaviridae Infections, Infections, Neoplasms by Histologic Type, Neoplasms, Ductal, Lobular, and Medullary, Nidovirales infectious disease, Orthocoronavirinae infectious disease, RNA Virus Infections, adenocarcinoma, breast carcinoma in situ, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, hereditary breast carcinoma, in situ carcinoma, invasive breast carcinoma, lung disorder, neoplasm, pneumonia, respiratory system disorder, respiratory tract infectious disorder, viral infectious disease, viral pneumoniaRecruitingNot stated2026-10-07NCT04169542
Surgical Excision vs Neoadjuvant Radiotherapy+Delayed Surgical Excision of Ductal CarcinomaCarcinoma, Ductal, Neoplasms by Histologic Type, Neoplasms by Site, Neoplasms, Ductal, Lobular, and Medullary, Skin and Connective Tissue Diseases, adenocarcinoma, breast carcinoma in situ, breast disorder, breast ductal adenocarcinoma, breast neoplasm, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasm, skin disorderRecruitingNot applicable2026-10-07NCT03909282
Diabetes Prevention Program With or Without Hunger Training in Helping to Lower Breast Cancer Risk in Obese ParticipantsBody Weight, Neoplasms by Histologic Type, Neoplasms, Ductal, Lobular, and Medullary, Nutritional and Metabolic Diseases, Overweight, Pathological Conditions, Signs and Symptoms, Signs and Symptoms, adenocarcinoma, breast carcinoma in situ, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasm, nutritional disorder, obesity disorder, overnutritionActive, not recruitingNot applicable2026-10-06NCT03546972
Prospective Evaluation of Breast-Conserving Surgery Alone in Low-Risk Ductal Carcinoma in Situ (DCIS)Neoplasms by Histologic Type, Neoplasms, Ductal, Lobular, and Medullary, adenocarcinoma, breast carcinoma in situ, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasmActive, not recruitingNot stated2026-10-05NCT04797299
Tamoxifen Citrate, Letrozole, Anastrozole, or Exemestane With or Without Chemotherapy in Treating Patients With Invasive RxPONDER Breast CancerNeoplasms by Histologic Type, Neoplasms, Ductal, Lobular, and Medullary, adenocarcinoma, breast carcinoma in situ, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, invasive breast carcinoma, neoplasm, synchronous bilateral breast carcinomaActive, not recruitingPhase 32026-10-01NCT01272037
Assessment of Biosignature Classification of DCIS for RadioTherapy Benefit Post Lumpectomy (ABCD RT)Neoplasms by Histologic Type, Neoplasms by Site, Neoplasms, Ductal, Lobular, and Medullary, Skin and Connective Tissue Diseases, adenocarcinoma, breast cancer, breast carcinoma in situ, breast disorder, breast neoplasm, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasm, skin disorderNot yet recruitingPhase 32026-09-30NCT07554573
DCIS: RECAST Trial Ductal Carcinoma In Situ: Re-Evaluating Conditions for Active Surveillance Suitability as TreatmentNeoplasms by Histologic Type, Neoplasms, Ductal, Lobular, and Medullary, adenocarcinoma, breast carcinoma in situ, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasmRecruitingPhase 22026-09-28NCT06075953
CAN1012 in Pre-Malignant DCIS and LCISNeoplasms by Histologic Type, Neoplasms by Site, Neoplasms, Ductal, Lobular, and Medullary, Skin and Connective Tissue Diseases, adenocarcinoma, breast carcinoma in situ, breast disorder, breast neoplasm, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, lobular breast carcinoma in situ, neoplasm, skin disorderRecruitingPhase 12026-09-24NCT07408856
Personalized Prone Immobilization for Accelerated Partial Breast RadiotherapyNeoplasms by Histologic Type, Neoplasms, Ductal, Lobular, and Medullary, adenocarcinoma, breast carcinoma in situ, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasmRecruitingNot applicable2026-09-23NCT07711847
Study of 3-Day Partial Breast Radiation Therapy in Women With Breast CancerCarcinoma, Ductal, Neoplasms by Histologic Type, Neoplasms by Site, Neoplasms, Ductal, Lobular, and Medullary, Skin and Connective Tissue Diseases, adenocarcinoma, breast cancer, breast carcinoma in situ, breast disorder, breast ductal adenocarcinoma, breast neoplasm, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, invasive ductal breast carcinoma, neoplasm, skin disorderRecruitingPhase 22026-09-21NCT04084730
Women Informed to Screen Depending on Measures of Risk (Wisdom Study)Neoplasms by Histologic Type, Neoplasms by Site, Neoplasms, Ductal, Lobular, and Medullary, Skin and Connective Tissue Diseases, adenocarcinoma, breast cancer, breast carcinoma in situ, breast disorder, breast neoplasm, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasm, skin disorderRecruitingNot applicable2026-09-21NCT02620852
Novel Cavity Marking Technique in Breast Cancer Patients Undergoing Breast Conservation Surgery With Oncoplastic Reconstruction for the Delivery of Adjuvant Radiotherapy and Accuracy of Recommended Re-excisionsNeoplasms by Histologic Type, Neoplasms by Site, Neoplasms, Ductal, Lobular, and Medullary, Skin and Connective Tissue Diseases, adenocarcinoma, breast cancer, breast carcinoma in situ, breast disorder, breast neoplasm, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasm, skin disorderRecruitingNot applicable2026-09-09NCT06903468
Ultra Hypo-fractionated Adjuvant Whole Breast Radiation Therapy With Simultaneous Integrated Boost for Early-Stage Breast Cancer (H-ASSIST)Neoplasms by Histologic Type, Neoplasms by Site, Neoplasms, Ductal, Lobular, and Medullary, Skin and Connective Tissue Diseases, adenocarcinoma, breast cancer, breast carcinoma in situ, breast disorder, breast neoplasm, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasm, skin disorderRecruitingPhase 22026-09-03NCT06902311
Phase I Trial of Endoxifen Gel Versus Placebo in Women Undergoing Breast SurgeryNeoplasms by Histologic Type, Neoplasms by Site, Neoplasms, Ductal, Lobular, and Medullary, Skin and Connective Tissue Diseases, adenocarcinoma, breast carcinoma in situ, breast disorder, breast neoplasm, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasm, skin disorderActive, not recruitingPhase 12026-09-02NCT03317405
Breast Cancer WEight Loss Study (BWEL Study)Neoplasms by Histologic Type, Neoplasms by Site, Neoplasms, Ductal, Lobular, and Medullary, Skin and Connective Tissue Diseases, adenocarcinoma, breast carcinoma in situ, breast disorder, breast neoplasm, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, invasive breast carcinoma, neoplasm, skin disorder, synchronous bilateral breast carcinomaActive, not recruitingPhase 32026-09-02NCT02750826
Prototype DAA/TAA Vaccine Targeting MUC1 for Immune Interception and Prevention in Ductal Carcinoma In SituNeoplasms by Histologic Type, Neoplasms, Ductal, Lobular, and Medullary, adenocarcinoma, breast carcinoma in situ, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasmRecruitingPhase 12026-08-18NCT06218303
Comparing Supplemental Topical Agents for the Treatment of Acute Radiation Dermatitis in Patients With Breast CancerNeoplasms by Histologic Type, Neoplasms, Ductal, Lobular, and Medullary, adenocarcinoma, breast carcinoma in situ, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, invasive breast carcinoma, neoplasmActive, not recruitingPhase 12026-08-17NCT05340673
Hypofractionated Radiation Therapy or Standard Radiation Therapy in Treating Patients With Ductal Breast Carcinoma In Situ or Early Invasive Breast CancerNeoplasms by Histologic Type, Neoplasms by Site, Neoplasms, Ductal, Lobular, and Medullary, Skin and Connective Tissue Diseases, adenocarcinoma, breast carcinoma in situ, breast disorder, breast neoplasm, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, invasive breast carcinoma, neoplasm, skin disorderActive, not recruitingPhase 22026-08-17NCT01266642
Omission of Adjuvant Radiotherapy in Young Low-Risk Ductal Carcinoma In Situ Following Breast-Conserving SurgeryNeoplasms by Histologic Type, Neoplasms, Ductal, Lobular, and Medullary, adenocarcinoma, breast carcinoma in situ, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasmRecruitingPhase 22026-08-13NCT07762924
Omission of Adjuvant Radiotherapy in Low- and Intermediate-Risk Ductal Carcinoma In Situ After Breast-Conserving SurgeryNeoplasms by Histologic Type, Neoplasms, Ductal, Lobular, and Medullary, adenocarcinoma, breast carcinoma in situ, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasmRecruitingPhase 32026-08-13NCT07762885
Low Dose Tamoxifen With or Without Omega-3 Fatty Acids for Breast Cancer Risk ReductionNeoplasms by Histologic Type, Neoplasms by Site, Neoplasms, Ductal, Lobular, and Medullary, Skin and Connective Tissue Diseases, adenocarcinoma, breast carcinoma, breast carcinoma in situ, breast disorder, breast neoplasm, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasm, skin disorderRecruitingPhase 22026-08-04NCT06195306
Finding the Best Tamoxifen Dose for Breast Cancer Risk Reduction in Premenopausal Women, RENAISSANCE TrialNeoplasms by Histologic Type, Neoplasms by Site, Neoplasms, Ductal, Lobular, and Medullary, Skin and Connective Tissue Diseases, adenocarcinoma, breast carcinoma, breast carcinoma in situ, breast disorder, breast neoplasm, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasm, skin disorderRecruitingPhase 22026-07-27NCT06184750
MRI Characterization of Mammographically Detected DCISNeoplasms by Histologic Type, Neoplasms by Site, Neoplasms, Ductal, Lobular, and Medullary, Skin and Connective Tissue Diseases, adenocarcinoma, breast carcinoma in situ, breast disorder, breast neoplasm, carcinoma, ductal breast carcinoma in situ, epithelial neoplasm, in situ carcinoma, neoplasm, skin disorderActive, not recruitingNot stated2026-07-21NCT03495011