What is bone marrow aspiration: The purpose of bone marrow aspiration is to understand the hematopoietic function of the bone marrow or the infiltration of the tumor into the bone marrow, and the puncture site can be chosen from the posterior superior iliac spine (hip), anterior superior iliac spine (lateral inguinal bone), and sternum. Except for patients with hemophilia and severe coagulation disorders, the rest of patients have no adverse reactions. Our department uses imported Italian puncture needles and biopsy needles, with a 100% success rate of retrieval and less discomfort for patients. What is lumbar puncture: The purpose of lumbar puncture is to determine whether leukemia infiltrates the central nervous system and to prevent and treat central nervous system leukemia. The puncture site is the 3rd-4th lumbar interspace (about the level of the trouser waist in the median line of the back). 2-3 ml of cerebrospinal fluid is usually taken, and then 2-3 ml of drugs are injected, by means of local anesthesia, and the patient needs to lie flat with the pillow removed for 4-6 hours after the procedure. What is chemotherapy for hematological diseases: Chemotherapy is a treatment for patients with malignant hematological diseases by oral or intravenous injection of chemical drugs in order to kill tumor cells. Common side effects include nausea and vomiting, loss of appetite, constipation, hair loss, fatigue, and in severe cases, impairment of heart, liver and kidney function and bone marrow suppression. Nausea and vomiting and other gastrointestinal symptoms can be prevented by drug administration, hair loss can be regenerated, heart, liver and kidney function damage can be prevented by drugs at the same time as chemotherapy, and bone marrow suppression can be recovered by treatment. Different chemotherapy regimens are used for different diseases, including oral regimens and intravenous regimens. The side effects of different chemotherapy regimens vary in size, from mild to severe, and are individualized according to the patient’s disease and physical condition.