METHODS Patients (n=113) from BRECOL study (NCT01733628) received bevacizumab in combination with oxaliplatin or irinotecan + fluoropyrimidines for metastatic colorectal cancer (n=49), and with paclitaxel or capecitabine for metastatic breast cancer (n=64). CONCLUSIONS High BP upon anti-angiogenic treatment is associated to specific DNA methylation profiles. We identified an epigenetic methylation signature putative predictive of secondary HTN to bevacizumab treatment in metastatic breast and colorectal cancer.