Identification of Biomarkers for Prediction of Response or Resistance Against Target Therapy in Gastric Cancer

Identification of Biomarkers for Prediction of Response or Resistance Against Target Therapy in Adenocarcinoma of the Stomach or Gastroesophageal Junction. A Non-interventional Study

The aim of this study is to identify biomarkers predicting response or resistance factors of a targeted therapy with trastuzumab in advanced gastric cancer.

Inclusion Criteria:

• histologically proven adenocarcinoma of the stomach or gastroesophageal junction

  • stage IV
  • patient receives chemotherapy
  • signed informed consent
  • Age > 18 years

Exclusion Criteria:

• Patient can not understand meaning and purpose of the study
• patient already received a chemotherapy treatment for advanced disease.