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The firm has received a supplemental approval that provides its customers with an option to purchase its IVD-labeled FLT3 mutation assay for in-house testing.
The drugmaker will promote Zejula without a biomarker as a first-line maintenance option, and Myriad will highlight that patients with HRD are most likely to benefit.
The firm said the assays detect all classes of alterations including genomic signatures for microsatellite instability, tumor mutation burden, and loss of heterozygosity.
The company filed the application based on the PAOLA-1 data, which showed HRD-positive ovarian cancer patients saw pronounced benefit from the combo.
Myriad filed an sPMA for myChoice CDx despite GSK's confidence that Zejula will be approved in newly diagnosed ovarian cancer regardless of biomarker status.
The test will be used to identify which metastatic, castration-resistant prostate cancer patients harbor germline BRCA mutations and will likely benefit from Lynparza.
The firm is seeking approval of myChoice HRD as a test that can identify ovarian, fallopian, or peritoneal cancer patients deficient in homologous recombination DNA repair.
The test is approved to gauge germline BRCA mutations in advanced breast cancer patients who may benefit from treatment with Pfizer's PARP inhibitor Talzenna.
The FDA approved its use with tissue or plasma biopsies, giving clinicians a non-invasive option to conduct a test that provides results in a day.
The so-called universal CDx approved by the FDA can gauge alterations across multiple genes associated with response to three lung cancer treatments.