Patients undergo laparoscopy for p53 assessment and catheter placement. Patients receive daily intraperitoneal injections of adenovirus p53 (Ad-p53) for 5 days every 3 weeks. Treatment is repeated every 21 days in the absence of disease progression or unacceptable toxicity. Cohorts of 3-6 patients each are treated at each dose level of Ad-p53. The maximum tolerated dose is defined as the dose at which no more than 1 of 6 patients experiences dose limiting toxicity.