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Clinical Trial Summary

The purpose of this study is to determine if and how often an unexpected fast increase of disease and complaints shows after stopping the anti-angiogenetic therapy


Clinical Trial Description

Until now, in trials it is common to stop therapy when progressive disease occurs; RECIST criteria are used, in which progressive disease is defined as >20% increase of the sum of the longest diameter of the lesions, or occurence of new lesions. However, angiogenesis inhibitors have a rather cytostatic than cytotoxic effect compared to chemotherapeutics, as a result of which less frequently reduction of tumor volume is being seen.

Often in the centre of the lesion necrosis is shown. Sometimes accompanied with edema; so even tumor volume increase can be the result without real progression being the case. Recently, in our clinic, we found a number of patients, treated with oral angiogenesis inhibitors, a remarkable quickening of progressive disease and complaints after stopping this treatment. Reintroduction of the same or another type of angiogenesis inhibitor subsequently lead to a new stabilization. The causality of this phenomenon is unknown. Perhaps that the inhibitory effect of the angiogenesis is not fully exhausted at the moment that progressive disease on CT is observed. An alternative explanation is contra reaction of longterm angiogenetic inhibition through upregulation of proangiogenic factors with subsequent vascular expansion and edema. This study means to gain more insight information about the optimal treatment policy when progressive disease is found in patients treated with oral angiogenesis inhibitors. Because of the increase of patients that is being treated with these products, both in trials as in daily clinical practice, this is important to investigate. ;


Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment


Related Conditions & MeSH terms


NCT number NCT00777504
Study type Interventional
Source Radboud University
Contact C.M.L. van Herpen, Md, Phd
Phone 31 24 3610353
Email c.vanherpen@onco.umcn.nl
Status Recruiting
Phase Phase 4
Start date October 2008
Completion date April 2012

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