In a patient with an ER-positive, HER2-negative ILC with heavy nodal burden s/p mastectomy, CT shows multiple new sclerotic bone lesions, but FDG-PET and bone scan are negative.
Would you proceed with PMRT, or defer pending additional staging (e.g., ER-targeted PET), and how would you time PMRT relative to planned endocrine ± CDK4/6 therapy?