Prognostic impact of reduced HER2 protein expression in post-neoadjuvant therapy resection specimens: A single institution experience and review of the literature
Background: Retesting for Human epidermal growth factor receptor-2 (HER2) in post-neoadjuvant therapy resection is variable, and data is bismarck armb?nd conflicting regarding the prognostic significance of changes in HER2 expression pre and post therapy.Methods: We identified 104 patients with localized HER2 IHC 3+ breast cancer who received neoad