Cytokeratin 19 Fragment
Laboratory Tests
estimated about CNY 500-1000
(estimated about USD 70-150)
30 min
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Description
Cytokeratin 19 fragment (CYFRA 21-1) is a blood tumor marker test used to monitor lung cancer and other epithelial cancers; in China, testing costs ¥70–¥150 and ChinaMedicalHub can assist with hospital booking and interpreter support.
Main Uses
The Cyfra 21-1 test is primarily used for: 1. Monitoring the response to treatment in patients with non-small cell lung cancer, 2. Detecting recurrence of cancer after treatment, 3. Assessing the prognosis in patients with certain types of cancer, 4. As an aid in the diagnosis of lung cancer, especially when combined with other clinical and diagnostic information, 5. Evaluating the effectiveness of therapy in patients with advanced lung cancer
Normal Range
The normal range for the Cyfra 21-1 (Cytokeratin 19 Fragment) test is typically less than 3.3 ng/mL, although this can vary slightly depending on the laboratory and the specific testing method used.
Low Values - Possible Causes
Low values of Cyfra 21-1 are generally not clinically significant and do not usually indicate a health problem. However, in some rare cases, it might be associated with: 1. Non-cancerous conditions, 2. Early stages of cancer before tumor markers become elevated, 3. Successful treatment or remission of cancer, 4. Individual biological variation, 5. Laboratory error or sample mishandling
High Values - Possible Causes
Elevated levels of Cyfra 21-1 may be caused by: 1. Lung cancer, particularly non-small cell lung cancer (NSCLC), 2. Other types of cancers such as head and neck, breast, or bladder cancer, 3. Benign lung diseases like chronic obstructive pulmonary disease (COPD) or pneumonia, 4. Smoking, 5. Kidney failure