Detecting Chemosensitivity and Predicting Treatmemt Efficacy With CTCs in mNPC

Inclusion criteria

• NPC patients with distant metastasis after 3 months of primary radiotherapy, and not suitable for local treatment
• At least having one measurable metastatic lesion
• All genders，range from 18～70 years old
• ECOG score 0 ~ 1
• Expected survival time ≥ 3 months
• White blood cell(WBC) count ≥ 3×109/L, neutrophile granulocyte(NE) count ≥ 1.5×109/L, hemoglobin(HGB) ≥ 90g/L, platelet(PLT) count ≥ 100×109/L
• Alanine aminotransferase (ALT) or aspartate aminotransferase(AST) < 2.5×upper limit of normal(ULN), bilirubin(BUN) or creatinine(CRE) < 1.5×ULN, alanine aminotransferase (CCR) ≥ 60ml/min
• Inform consent form

Exclusion criteria

• Have or are suffering from other malignant tumors;
• Participating in other clinical trials;
• Drug or alcohol addition;
• Do not have full capacity for civil acts;
• Mental disorder;
• Pregnancy or lactation;
• Severe complication, eg, uncontrolled hypertension.