Study reveals how lung cancers evolve in response to targeted treatment

A detailed analysis of lung tumors that became resistant to targeted therapy drugs has revealed two previously unreported resistance mechanisms. In a report in the March 23 Science Translational Medicine, investigators from the Massachusetts General Hospital (MGH) Cancer Center also describe how the cellular nature of some tumors actually changes in response to treatment and find that resistance-conferring mutations can disappear after treatment is discontinued. The findings support the importance of monitoring the molecular status of tumors throughout the treatment process.

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