Standard or Comprehensive Radiation Therapy in Treating Patients With Early-Stage Breast Cancer Previously Treated With Chemotherapy and Surgery

Androgen-Deprivation Therapy and Radiation Therapy in Treating Patients With Prostate Cancer

Aspirin in Preventing Recurrence of Cancer in Patients With HER2 Negative Stage II-III Breast Cancer After Chemotherapy, Surgery, and/or Radiation Therapy

MRI and Mammography Before Surgery in Patients With Stage I-II Breast Cancer

Androgen-Deprivation Therapy and Radiation Therapy in Treating Patients With Prostate Cancer

Comparison of Axillary Lymph Node Dissection With Axillary Radiation for Patients With Node-Positive Breast Cancer Treated With Chemotherapy

Veliparib, Pembrolizumab, and Combination Chemotherapy in Treating Patient With Locally Advanced Rectal Cancer

Breast Cancer WEight Loss Study (BWEL Study)