OUTLINE: All patients undergo a thoracoscopy under general anesthesia. The thoracoscope is removed and any collected fluid is drained from the chest cavity. The first treatment with liposomal-cisplatin analogue (L-NDDP) is administered at this time into the intrapleural space over a 10 minute period. Subsequent 10 minute intrapleural infusions of L-NDDP through a percutaneous catheter are administered every 3 weeks. Treatment continues unless unacceptable toxic effects or disease progression occurs. Antitumor activity is assessed 2 months after the second course of therapy, and every 2 months thereafter.