For many years a great deal of stress has been placed on the elimination of the possibilities of autotransplantation of tumor during a surgical procedure. Various techniques have been evolved for different surgical procedures which would tend to prevent spillage and implantation of tumor. This study purposely involved autotransplantation of tumors to obtain knowledge of the nature of takes, length of incubation, growth rate, and possible action of autogenous tumor transplants as an autovaccine.Materials and MethodsVolunteer patients with incurable cancer on the Chemotherapy Service at Roswell Park Memorial Institute were involved in this study; a total number of 82 patients were used. At the time of surgical exploration, multiple specimens of tumor were obtained; one portion was sent for pathological examination for confirmation of the diagnosis. After all necrotic or extraneous tissue had been excised, the other pieces of sterile tumor were finely minced with a scalpel and