An Observational Study on Human Epidermal Growth Factor Receptor (HER) 2 Status of Breast Invasive Carcinoma in Latin American Participants

Epidemiological, Prospective and Observational Study on the HER2 Status in Breast Invasive Carcinomas Assessed by Immunohistochemistry (IHC) and Silver In-situ Hybridization (SISH) in a Sample of Latin-American Patients

This is a descriptive, prospective, observational and epidemiological study on participants recently diagnosed with breast cancer to evaluate the HER2 status by IHC and SISH procedures.

Inclusion Criteria:

- Anatomopathological samples (surgical specimens or when a surgical sample is not possible, a core needle biopsy may be used) from female participants with a histopathological diagnosis of invasive breast cancer

Exclusion Criteria:

• Samples whose residual material in the paraffin block(s) is insufficient for neoplasm representation in the procedures in this study
• Cancer samples that have received previous chemotherapy treatment