Omission of Local Therapies in Women Patients With HER2-positive or Triple-negative Breast Cancer

Conditions studied

Breast Neoplasm Malignant Female

About this study

HER2-positive and Triple-negative are subtypes of breast cancer more sensitive to systemic therapies, where the complete pathological response rate may be higher than 50%. This gave rise to doubts about the usefulness of traditional local treatments for such responders. Omission of surgery after vacuum assisted breast biopsy (VABB) as well omission of radiotherapy after conservative surgery would now seem to be reasonable alternatives to standard care for highly selected patients, in whom systemic treatments have provided the maximum response.

Interventions

• Other: Omission of local therapies — Omission of surgery (arm A) or radiotherapy (arm B) in those patients who have had the maximum response by neoadjuvant treatments. Maximum responders are those patients with no evidence of residual disease after neoadjuvant treatment at imaging -including mammography, US evaluation and contrast imaging procedures (MRI and/or CEM)-, confirmed by VABB on marked site of ascertained lesion. This study is open to all patients with T1-2, N0-1, M0 HER2-positive or triple negative breast cancer, treated with neoadjuvant systemic treatment, irrespective of treatments delivered.

Primary outcomes

• Events-free survival (EFS) for each study arm. (5 years)

Eligibility information

Study locations

• Fondazione IRCCS Istituto Nazionale Tumori Milano, Milan, 20133 Italy