名词
中文翻译：循环肿瘤
同义词：
['circulating tumor cell DNA', 'circulating tumor nucleic acid']
例句：
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1. The test is designed to detect mutations in the ctDNA of cancer patients.
该测试旨在检测癌症患者的循环肿瘤DNA中的突变。
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2. Researchers have found that ctDNA can be used as a biomarker for early detection of lung cancer.
研究人员发现，循环肿瘤DNA可以作为肺癌早期检测的生物标志物。
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3. The patient's ctDNA was analyzed to identify any genetic mutations associated with the disease.
对患者的循环肿瘤DNA进行分析，以识别与疾病相关的任何遗传突变。