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For PDL1 testing in triple negative breast cancer, is CPS by 22C3 equivalent to SP142 Ventana?
Answer from: Medical Oncologist at Academic Institution
The short answer is that 22C3 is not equivalent to SP142. There are cases that are double-positive but 22C3 positive and SP142 negative cases exist. While benefit from atezolizumab and nab-paclitaxel seems to be seen for SP142 positive breast cancer (based on the results of IMpassion130 trial), the ...
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