Extraskeletal masses are chondrosarcomas. Central chondrosarcoma is a chondrosarcoma that originates from within the bone. The main symptom is deep pain that is not intense and non-persistent. In the progressive stage of the tumor, large spherical extraosseous masses may form. There are distinct sites of predilection, in order of predilection, for the femur (especially proximal), pelvis, proximal humerus, scapula, and proximal tibia. The other bones of the trunk, the radius, the ulna, the foot, and the hand (chondromas are more common in the hand and less common in the trunk bones) are the less frequent sites of softness. Suitable foods for patients with extra-osseous masses: ①It is advisable to eat more foods with anti-myelopathy and osteosarcoma, such as kelp, nori, light vegetables, sea clams, wakame, almonds, peach kernel and plum. ②It is advisable to eat turtle plate, turtle meat, Impatiens, oyster, crab, shrimp and walnut for bone pain. ③Spleen enlargement is appropriate to eat snapper, loach, sea eel, ark, kelp, wakame. ④Anemia, pig liver, mushroom, sesame, bee’s milk, yellow fish, peanut, sea cucumber, grass carp, abalone. ⑤ It is advisable to eat turtle and eel during chemotherapy. The white blood cell supplement, chemotherapy needs enough white blood cells, not enough can not be chemotherapy. Cordyceps, which can reduce the side effects of chemotherapy. Dietary contraindications for patients with extra-osseous masses: ① Avoid tobacco, alcohol and spicy stimulating food. ② Avoid moldy, pickled, fried, fatty food. ③ Avoid chicken, mutton, goose, pig head meat and other hairy food.