Circulating Tumor DNA (ctDNA)

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Myriad Genetics Announces Precise MRD Clinical Data Published in The Lancet Oncology
Globenewswireยท 2025-09-04 23:00
Core Insights - Myriad Genetics announced the publication of a study in The Lancet Oncology, showcasing the effectiveness of its Precise MRD test for patients with oligometastatic clear-cell renal cell carcinoma (ccRCC) [1][4] Study Findings - The study aimed to assess the benefits of ultrasensitive MRD testing in oligometastatic ccRCC patients, revealing that circulating tumor DNA (ctDNA) levels correlate with responses to metastasis-directed radiation therapy (MDT) [2][3] - The Precise MRD test successfully detected ctDNA in patients with low tumor burden, potentially allowing them to delay or avoid systemic treatments, thus reducing side effects and enabling treatment de-escalation [2][3] Key Metrics - In the Phase 2 trial, patients who were ctDNA negative experienced nearly double the median systemic therapy-free survival compared to ctDNA positive patients [3] - 94% of patients tested at baseline had ctDNA levels below 100 ppm, indicating the effectiveness of the ultrasensitive testing [7] - Patients who tested negative for ctDNA maintained MDT for a median of 54 months, while those who tested positive progressed to systemic therapy within a median of 27 months [7] - Overall survival rates for ctDNA negative patients on MDT were 94% at two years and 87% at three years [7] Test Overview - Myriad's Precise MRD Test utilizes whole genome sequencing to monitor numerous tumor-specific variants, providing high sensitivity and quantification of ctDNA in cancer patients [5] - The test can be employed throughout a patient's clinical journey, starting from diagnosis and continuing through treatment [5] Company Background - Myriad Genetics specializes in molecular diagnostic testing and precision medicine, aiming to enhance health and well-being through advanced genetic and genomic testing solutions [8]