DISEASE CHARACTERISTICS:
* Histologically confirmed peritoneal carcinomatosis with the following histologies:
* Primary peritoneal mesothelioma
* Adenocarcinoma of gastrointestinal tract origin
* Confined to peritoneal cavity
* Tumor mass could be debulked to less than 2.5 cm in diameter per tumor deposit
* Must not have failed prior intraperitoneal platinum therapy
* Treatment failure is defined as radiographic evidence of disease progression on 2 consecutive CT scans within 3 months after therapy
PATIENT CHARACTERISTICS:
Age:
\- 20 to 70 years old
Performance status:
\- KPS\>50
Life expectancy:
\- More than 8 weeks
Hematopoietic:
* WBC at least 3,500/mm\^3
* Platelet count at least 80,000/mm\^3
Hepatic:
* Bilirubin no greater than 2 times upper limit of normal (ULN)
* AST and ALT no greater than 2 times ULN
* Liver enzymes no greater than 2 times ULN
Renal:
\- Creatinine no greater than 1.5 mg/dL
Cardiovascular:
* No significant irreversible cardiac ischemia
* No significant changes in ECG recording
Pulmonary:
* FEV\_1 at least 1.2 liters
* Maximum voluntary ventilation at least 50% expected
Other:
* Not pregnant or nursing
* Negative pregnancy test
* No concurrent medical problems that would preclude surgery
