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Cancer SEEK is a non-invasive blood test that can be used to screen for multiple common types of cancer in asymptomatic apparently healthy individuals. It can detect eight common cancer types through assessment of the levels of circulating proteins and mutations in cell-free DNA. The majority of localized cancers can be cured by surgery alone without any systemic therapy. Once distant metastasis has occurred; however, surgical excision is rarely creative. There is a wide window of opportunity to detect cancer before the onset of metastasis. Early detection of cancer is key to reducing cancer deaths offers crucial buying time for patients to take advantage of timely therapy and treatment.