Patients receive cyclophosphamide IV. 48-72 hours after cyclophosphamide administration, patients receive tumor cell vaccine intradermally. Patients also receive sargramostim (GM-CSF) subcutaneously prior to vaccine administration and once daily for the next 8 days. Treatment repeats every 2 weeks for 3 courses in the absence of unacceptable toxicity. Patients with responding or stable disease after completion of course 3 may receive additional courses.