Πέμπτη 12 Απριλίου 2018

Trastuzumab Plus Pertuzumab Resistance Does Not Preclude Response to Lapatinib Plus Trastuzumab in HER2‐Amplified Colorectal Cancer

AbstractHuman epidermal growth factor 2 (HER2) amplification represents a distinct molecular subgroup of colorectal cancers that is associated with anti‐epidermal growth factor receptor resistance and sensitivity to dual HER2 targeting. Although clinical trials have reported activity for trastuzumab/pertuzumab and trastuzumab/lapatinib combinations, there are no reports on lapatinib plus trastuzumab activity after resistance to trastuzumab plus pertuzumab. Presented are three cases of HER2 amplified colorectal cancer that developed acquired refractoriness to trastuzumab pertuzumab with subsequent clinical benefit to lapatinib plus trastuzumab, highlighting the potential for HER2 tyrosine kinase inhibition plus trastuzumab in overcoming trastuzumab/pertuzumab resistance.

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