Selective Neoadjuvant Treatment According to Immunohistochemical Subtype for HER2 Negative Breast Cancer Patients

This is an open-label study that includes two substudies of random distribution. First,a sample of the primary tumor will be obtained and will be analyzed by an immunohistochemical technique to determine several markers.Depending on the expression of these markers, the patients will be characterize as group 1 (Luminal A phenotype) or group 2 (Basal phenotype) and a random assignment will be performed to standard or experimental treatment.

Group 1 (Luminal A):

• Standard treatment: EC x 4 -> Tx4
• Selective treatment: Postmenopausic patients: exemestane x 6 months; Premenopausic Patients: goserelin x 6 months + exemestane x 6 months

Group 2 (Basal):

• Standard treatment: EC x 4 -> Tx4
• Selective treatment: EC x 4 -> CDPT x 4

• Drug: Standard treatment
  EC x 4 -> Tx4
• Drug: Selective treatment
  Postmenopausic patients: exemestane x 6 months; Premenopausic Patients: goserelin x 6 months + exemestane x 6 months
• Drug: Standard treatment
  ECx4-> Tx4
• Drug: Selective treatment
  EC x4->CBPT x4

• Active Comparator: Group 1 (Luminal A) QT
  Standard treatment
  Intervention: Drug: Standard treatment
• Experimental: Group 1 (Luminal A) HT
  Selective treatment
  Intervention: Drug: Selective treatment
• Active Comparator: Group 2 (Basal) Standard treatment
  Standard treatment
  Intervention: Drug: Standard treatment
• Experimental: Group 2 (Basal) Selective treatment
  Intervention: Drug: Selective treatment

Inclusion Criteria:

• Written informed consent.
• Breast cancer with histological diagnosis.
• Negative HER2neu tumours(defined as IHQ 0,1+).
• No evidence of suspicion of metastatic disease.
• Age >= 18 years old.
• Performance status (Karnofsky index) >= 80 (ECOG 0,1).
• Adequate cardiac function by ECG in the previous 12 weeks.
• Hematology: neutrophils >= 1,5 x10^9/l; platelets >= 100 x10^9/l; hemoglobin >= 10 g/dl.
• Adequate hepatic function: total bilirubin <= 1x upper normal limit (UNL); SGOT and SGPT <= 2.5xUNL; alkaline phosphatase <= 2.5xUNL.
• Adequate renal function: creatinine <= 1xUNL; creatinine clearance >= 60 ml/min.
• Patients able to comply with study treatment and follow-up.
• Negative pregnancy test in the previous 14 days.

Exclusion Criteria:

• HER2neu positive tumours (defined as IHQ 3+ or positive FISH).
• Prior systemic therapy for breast cancer (immunotherapy, hormonotherapy, chemotherapy).
• Prior treatment with anthracyclines or taxanes (paclitaxel, docetaxel) for any previous malignancy.
• Prior radiotherapy for breast cancer.
• Bilateral invasive breast cancer.
• Pregnant or lactating women.
• Previous grade >= 2 motor or sensorial neurotoxicity (National Cancer Institute Common Toxicity Criteria [NCI CTC]).
• Other serious comorbidities: congestive heart failure or unstable angina; prior history of myocardial infarction in previous year; uncontrolled hypertension (HT); high risk arrhythmias; history of significant neurological or psychiatric disorders; uncontrolled active infection; active peptic ulcer; unstable diabetes mellitus; dyspnea at rest; or chronic therapy with oxygen.
• Previous or current history of neoplasms different from breast cancer, except for skin carcinoma, cervical in situ carcinoma, or any other tumor curatively treated and without recurrence in the last 10 years; ductal in situ carcinoma in the same breast; lobular in situ carcinoma.
• Chronic treatment with corticosteroids.
• Contraindications for administration of corticosteroids.
• Concomitant treatment with other therapy for cancer.
• Males.