Study of Human Epidermal Growth Factor Receptor 2 (HER2) Expression in Participants With Early/Metastatic Breast Cancer in Saudi Arabia

A Retrospective, Observational Molecular Epidemiology Study of HER2 Expression in Patients With Early / Metastatic Breast Cancer in Saudi Arabia

This is a retrospective, multicenter study, consisting of chart review of Saudi Arabian participants diagnosed with breast cancer between 2007 and 2013 and with available human epidermal growth factor receptor 2 (HER2) testing. Data on survival will be collected through 2015.

Inclusion Criteria:

• Initially diagnosed with breast cancer
• Has a proven result of HER2 testing by immunohistochemistry (IHC), fluorescent in situ hybridization (FISH) or any other in situ hybridization (ISH) method
• Alive or not alive

Exclusion Criteria:

- Inconclusive, equivocal or unavailable result of HER2/neu overexpression by IHC and FISH