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'Weeding the garden' lets ALK+ lung cancer patients continue crizotinib
Date:1/28/2014

hool of Medicine Department of Radiation Oncology and the paper's first author. "Using stereotactic body radiotherapy, we can ablate these limited sites of progressive disease so patients can continue on the drug they are on a technique we refer to as 'weeding the garden'."

The current study reports median two-year follow-up results of up to three courses of local ablative therapy to control resistant, progressive disease in ALK+ lung cancer patients.

Specifically, the group followed the experience of 38 ALK+ non-small cell lung cancer patients. Of these 38 patients, 33 progressed during the study, meaning the disease gained resistance to crizotinib. Fourteen of those patients progressed in a way that allowed for local ablative therapy. These eligible patients received 1-3 rounds of radiotherapeutic local ablative therapy to "weed the garden" of resistant pockets of disease. Examples of sites that were treated included metastases to the lung, liver, abdominal lymph nodes, and adrenal glands.

"With this long follow up, we can now see that on average it took 5.5 months from the first use of local ablative therapy until further evidence of progression on crizotinib occurred a duration of disease control that is highly competitive with what any new drug-based therapy might be expected to achieve in the acquired resistance setting. In addition, we found that you can use radiotherapeutic local ablative therapy in the same patient multiple times with excellent control of these sites of resistant cancer and minimal to no side-effects. By keeping these patients on crizotinib for longer periods of time and/or because of the direct effect of the local ablative therapy, there was a suggestion that patients may also being enjoying a significant survival benefit," says Ross Camidge, MD, PhD, director of the Thoracic Oncology Clinical Program at the CU Cancer Center and the senior author of the study. However, Camidge cautions that this apparent overal
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Contact: Garth Sundem
garth.sundem@ucdenver.edu
University of Colorado Denver
Source:Eurekalert

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