Individualized Treatment of Pediatric R/R AML Based on Transcriptomic Profile and in Vitro Drug Sensitivity Test

Inclusion Criteria: \- (1) Refractory recurrent acute myeloid leukemia (AML), and after second-line reinduction therapy, such as C+HAG did not reach complete CR.Criteria for complete response, refractory, and recurrence are as follows. (2) \<18 years old; (3) The child had good organ function, could tolerate chemotherapy, and had a physical strength score of 0-3 (WHO standard); (4) Understand the research procedures and voluntarily sign written informed consent. Exclusion Criteria: \- (1) Acute promyelocytic leukemia, chronic myelogenous leukemia, acute mixed cell leukemia or known central nervous system leukemia; (2) AML associated with congenital syndromes such as Down syndrome, Fanconi anemia, Bloom syndrome, Cole's syndrome, or congenital aplastic anemia; (3) secondary to immunodeficiency or positive for human immunodeficiency virus (HIV); (4) Cardiac and renal function were obviously abnormal, and left ventricular ejection fraction was \<50%. (5) There is active systemic infection; (6) any medical history or concomitant condition that the investigator believes would impair the subject's safe completion of the study; (7) The investigator considers that the subject is medically unfit to receive the investigational drug or is unfit for any other reason; (8) a known or suspected allergy to the subject drug or to any drug administered in connection with this test;