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Cancer Eligible for EndoPredict® Testing","PRELUDE","Inclusion Criteria:\n\n* Age ≥ 18 years old.\n* Histological diagnosis of invasive breast cancer.\n* T1-T3 tumor size.\n* 0-3 positive axillary lymph nodes.\n* Documented ER-positive tumor by immunohistochemistry (≥1% or Allred Score: ≥3\u002F8 or H-score: ≥50\u002F 300)\n* Documented HER2-negative tumor by immunohistochemistry and\u002For in situ hybridization\n* Subject with signed and dated informed consent form.\n\nExclusion Criteria:\n\n* History of another primary malignancy within the last 5 years, except for resected non-melanoma skin cancer.\n* Pre-operative chemotherapy administered.\n* Subject without signed and dated informed consent form.","ALL","18 Years",{"count":178,"type":179},2000,"ESTIMATED","10 Years","OBSERVATIONAL","The study is planned to observe and document the therapeutic decision-making process, treatment protocols, and clinical outcomes in patients with luminal breast cancer, whether they have undergone 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