Objective of this study is to investigate of efficacy and safety of recombinant adenoviral human p53 Gene (rAd-p53) in treatment of malignant pleural effusion, compared to cisplatin. This is a phase 2, double blinded, randomized, active controlled study.

Objective of this study is to investigate of efficacy and safety of recombinant adenoviral human p53 Gene (rAd-p53) in treatment of malignant pleural effusion, compared to cisplatin. Study design: phase 2, double blinded, randomized, active controlled.Ninety patients with malignant pleural effusion, who meet the study inclusion criteria and none of exclusion criteria, will be randomized into 3 treatment groups: rAd-p53, cisplatin, and rAd-p53 combined with cisplatin. The study endpoints are objective response rate, Karnofsky score, effusion-free survival, and safety.

Inclusion Criteria:

1. histopathologically diagnosed original cancer with malignant pleural effusion;
2. 18 years or older;
3. with normal tests of hemogram, blood coagulation, liver and kidney function; 6.signed the informed consent form.
4. signed the informed consent form

Exclusion Criteria:

1. Serious blood coagulation disorder, bleeding tendency, platelet < 6 * 1000000000/L;
2. have serious heart, lung function abnormalities or severe diabetes patients;
3. active infection;
4. severe atherosclerosis;
5. AIDS patients;
6. serious thrombotic or embolic events within 6 months;
7. renal insufficiency requiring hemodialysis or peritoneal dialysis;
8. pregnant or lactating women;
9. mental disorder or disease.