Tumour growth increased following antiangiogenic interruption: the challenge of tumour evaluation

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Abstract

Vascular endothelial growth factor inhibitors, led by bevacizumab, are considered the cornerstone of the therapy in metastatic colorectal carcinoma. We present the case of a patient with metastatic colorectal cancer who experienced rapid tumour growth with liver broad invasion after the withdrawal of an antivascular endothelial growth factor therapy, aflibercept. The rebound effect caused by the residual tumour inducing a regrowth after an initial controlled disease has already been stressed in mice and metastatic colorectal cancer patients following bevacizumab interruption. The use of liver volume evaluation was consistent with the Response Evaluation Criteria in Solid Tumours 1.1 criteria evaluation and might be a useful tool in patients with more than a half liver invasion. We describe for the first time the case of a major liver disease progression, confirmed by Response Evaluation Criteria in Solid Tumours 1.1 criteria and liver volume evaluation, after an antiangiogenic interruption in second line.

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