Cyclophosphamide Plus Vaccine Therapy in Treating Patients With Advanced Cancer

RATIONALE: Drugs used in chemotherapy work in different ways to stop tumor cells from dividing so they stop growing or die. Vaccines made from a patient’s tumor tissue may make the body build an immune response to kill tumor cells. Chemotherapy combined with vaccine therapy may kill more tumor cells. PURPOSE: Phase II trial to study the effectiveness of combining cyclophosphamide with tumor cell vaccine in treating patients who have metastatic cancer or cancer at high risk of recurrence.