OUTLINE: This is an abbreviated dose escalation, multicenter study of SCH-58500. Patients receive SCH-58500 by intraperitoneal instillation on days 1-5 (depending on dose level). Patients undergo ascites fluid and tumor sampling before and after intraperitoneal instillation. The ascitic fluid or tumor and normal tissue are then submitted for cytologic or histopathologic examination and biological activity analysis. Cohorts of 3-6 patients receive escalating doses of SCH-58500 until 3 patients experience dose limiting toxicity or until the highest planned dose is reached. Patients are followed at 2 months, every 3 months for 1 year, and then yearly thereafter.