Patients must have adequate tumor bulk accessible to biopsy in order to generate the tumor lysate (at least 2 cm diameter). Procedures employed to acquire biopsies for tumor lysates will be limited to percutaneous biopsies or open biopsies of readily accessible lesions. Patients should not undergo biopsies, which will later compromise the ability to render function preserving local therapy (e.g. limb salvage therapy). To prevent this, all bone biopsies should be performed in consultation with the orthopedic consultant on the case. For patients with bone marrow involvement, bone marrow aspirates may be used as a source of tumor for tumor lysates. Patients are not eligible if, in the opinion of the principal and associate investigators, tumor biopsy would entail extensive surgery such as thoracotomy or laparotomy, or if the tumor site places the patient at substantial risk from the biopsy procedure.