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What is this test?
➤ CYRFA 21-1 (cytokeratin 19 fragment) has been demonstrated as clinically useful in the prognostication and monitoring of non-small cell lung cancer (NSCLC). Elevated pretreatment levels may be associated with unfavorable prognosis, and decreasing levels during therapy predict an objective response to treatment. However, the level of CYFRA 21-1 cannot be used as absolute evidence for the presence or absence of disease and results must be viewed in context with other clinical evidence.
➤ No special preparation needed.