We proceeded with DC immunotherapy for 21 cancer patients. Immature dendric cells were injected intratumorally to the 16 patients, and three good and effective cases were obtained: case 1: A 69-year-old male patient with papilla-vater carcinoma, case 2: A 49-year-old female patient with gastric cancer, case 3: A 66-year-old male patient with malignant melanoma.