- 1. age>=20 2. pathologically confirmed patients with carcinoma of unknown primary 3. unfavorable type of CUP 4. ECOG PS 0-2 5. more than 1 evaluable lesion 6. life expectancy > 12 weeks 7. no prior history of chemotherapy 8. more than 2 weeks after surgery or radiotherapy 9. proper organ function 10. written informed consent