 Patients achieving a complete response CR or partial response PR after day 15 may continue to receive caspofungin acetate as above until day 84 OR discontinue study treatment after day 15 and shift to an oral antifungal drug for maintenance therapy or prophylaxis, if considered to be in the best interest of the patient. Patients achieving stable disease after day 15 continue to receive caspofungin acetate as above until day 28. These patients then undergo a second evaluation. Patients who maintain stable disease continue to receive caspofungin acetate as above until day 84. Patients achieving CR or PR are treated as per CR or PR treatment described above. 