Abstract: The invention relates to a method (i) for detecting a carcinoma, especially an adenocarcinoma, preferably a gastrointestinal carcinoma and more preferably a colorectal carcinoma, (ii) for predicting metastases, preferably liver metastases, depending on a primary colon carcinoma and/or (iii) for predicting the response of metastases to a 5-fluorouracil-containing chemotherapy. The inventive method comprises determining a gene expression profile of 120 marker genes or a selection thereof.