NEW YORK (GenomeWeb) – The US Food and Drug Administration has approved the PD-L1 (SP142) Assay developed by Roche subsidiary Ventana as a complementary diagnostic for Genentech's PD-L1 inhibitor Tecentriq, which was recently approved to treat lung cancer.

The complementary assay, while not required for the safe and effective use of Tecentriq, can determine patients' PD-L1 expression levels, which in turn "can provide insight into the survival benefit that may be achieved" with treatment, Roche said in a statement today. The test gauges PD-L1 expression in tumor and immune cells.

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