2.Diagnosis and management of orbital and cranial complications of pediatric acute rhinosinusitis.
Xiao Jian YANG ; Li Xing TANG ; Peng Peng WANG ; Yan Hui CUI ; Ji Hang SUN ; Wei ZHANG ; Xiao XIAO ; Yang HAN ; Wen Tong GE
Chinese Journal of Otorhinolaryngology Head and Neck Surgery 2023;58(2):133-138
		                        		
		                        			
		                        			Objective: To review the clinical characteristics, to illustrate diagnosis and management experience of orbital and cranial complications of pediatric acute rhinosinusitis. Methods: The clinical data of 24 children with orbital and cranial complications of acute rhinosinusitis who received endoscopic sinus surgery combined with drug treatment in Beijing Children's Hospital from January 2017 to December 2021 were retrospectively reviewed. There were 19 boys and 5 girls. The age varied from 13 to 159 months, with a median 47.5 months. The following diagnoses were obtained: 12 isolated subperiosteal orbital abscess, 2 associated with preseptal abscess, 2 associated with intraorbital abscess, 7 associated with optic neuritis, and 1 associated with septic cavernous sinus thrombosis. Clinical characteristics, organism isolated and outcomes were analyzed through descriptive methods. Results: All 24 patients presented with fever; 9 presented with nasal congestion and purulent discharge. The clinical manifestations of orbital infection included orbital edema, pain, proptosis and displacement of globe in all patients, while visual impairment was recognized in 7 children. Purulent drainage was cultured in 17 patients, among which 12 were positive. All patients underwent nasal endoscopic surgical interventions uneventfully, excluding one patient who required a second surgical procedure. Follow-up period ranged from 5 to 64 months. All patients resolved fully, with the exception of 2 children who got permanent blindness with visual loss preoperative. There was no recurrence or death. Conclusions: Orbital and cranial complications of pediatric acute rhinosinusitis could be severe with an occult onset. For patients with vison impairment, any signs of intracranial complications and a lack of response to conservative management, an urgent endoscopic intervention is needed.
		                        		
		                        		
		                        		
		                        			Male
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Child
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Abscess/therapy*
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Sinusitis/therapy*
		                        			;
		                        		
		                        			Orbital Cellulitis
		                        			;
		                        		
		                        			Acute Disease
		                        			;
		                        		
		                        			Exophthalmos
		                        			;
		                        		
		                        			Orbital Diseases/therapy*
		                        			
		                        		
		                        	
3.Serum lipoprotein-associated phospholipase A2 level is positively correlated with the recurrence risk of acute ischemic cerebral infarction in hypertensive patients.
Li Bing LIANG ; Jing Juan CHEN ; Cheng Guo ZHANG ; Yu Kai WANG ; Bai Gui LUO ; Tian En ZHOU ; Xiao Feng WANG
Journal of Southern Medical University 2023;43(2):317-322
		                        		
		                        			OBJECTIVE:
		                        			To explore the relationship between serum lipoprotein-associated phospholipase A2 (Lp-PLA2) level and the risk of acute ischemic stroke (AIS) recurrence in hypertensive patients.
		                        		
		                        			METHODS:
		                        			This retrospective case-control study was conducted among 211 hypertensive patients with AIS treated in Foshan First People's Hospital, including 35 patients with recurrence of AIS during the 1-year follow-up as confirmed by head CT/MR. In the overall patients, 60 had grade 1 hypertension (including 5 recurrent cases), 76 had grade 2 hypertension (with 11 recurrent cases), and 75 had grade 3 hypertension (with 19 recurrent cases). Univariate analysis, multivariate logistic regression analysis, trend analysis, and smooth curve fitting analysis were performed to explore the correlation between serum Lp-PLA2 level within 24 h after admission and the risk of AIS recurrence. The predictive efficacy of serum Lp-PLA2 level for AIS recurrence in different hypertension grades was evaluated using ROC curve analysis.
		                        		
		                        			RESULTS:
		                        			Serum Lp-PLA2 level, age, NIHSS score at admission, mRS scores at 7 days, homocysteine level and smoking status differed significantly between patients with and without AIS recurrence (P < 0.05). After adjustment for confounding factors, multivariate regression analysis showed that the highest tertile of Lp-PLA2 level was associated with a 4.13-fold increase of AIS recurrence risk compared with the lowest tertile (OR=5.13, 95% CI: 1.35-19.40), and each 1 ng/mL increase of Lp-PLA2 level was associated with a 1% increase of AIS recurrence risk (OR= 1.01, 95% CI: 1.01-1.02). Serum Lp-PLA2 level was shown to positively correlate with AIS recurrence risk, and in patients with grade 3 hypertension, its areas under the ROC curve for predicting AIS recurrence was 0.869 with a specificity of 0.893 and a sensitivity of 0.737.
		                        		
		                        			CONCLUSION
		                        			Serum Lp-PLA2 concentration is an independent risk factor and potentially an effective predictor for AIS recurrence in patients with grade 3 hypertension.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Infant, Newborn
		                        			;
		                        		
		                        			1-Alkyl-2-acetylglycerophosphocholine Esterase
		                        			;
		                        		
		                        			Acute Disease
		                        			;
		                        		
		                        			Biomarkers
		                        			;
		                        		
		                        			Brain Ischemia/etiology*
		                        			;
		                        		
		                        			Case-Control Studies
		                        			;
		                        		
		                        			Cerebral Infarction
		                        			;
		                        		
		                        			Hypertension/complications*
		                        			;
		                        		
		                        			Ischemic Stroke/complications*
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Risk Factors
		                        			;
		                        		
		                        			Stroke
		                        			
		                        		
		                        	
4.Mismatched donor cell infusion-related syndrome following microtransplant in patients with acute myeloid leukemia.
Bo CAI ; Xiaoyan ZOU ; Xin NING ; Tieqiang LIU ; Bingxia LI ; Yaqing LEI ; Jianhui QIAO ; Kaixun HU ; Yangyang LEI ; Zhiqing LIU ; Bo YAO ; Huisheng AI ; Yi WANG ; Changlin YU ; Mei GUO
Chinese Medical Journal 2023;136(7):815-821
		                        		
		                        			BACKGROUND:
		                        			Immunotherapies such as adoptive immune cell infusion and immune-modulating agents are widely used for cancer treatment, and the concomitant symptoms, including cytokine release syndrome (CRS) or immune-related adverse events (irAEs), are frequently reported. However, clinical manifestations induced by mismatched donor granulocyte colony-stimulating factor mobilized peripheral blood mononuclear cell (GPBMC) infusion in patients receiving microtransplant (MST) have not yet been well depicted.
		                        		
		                        			METHODS:
		                        			We analyzed 88 cycles of mismatched GPBMC infusion in patients with acute myeloid leukemia receiving MST and 54 cycles of chemotherapy without GPBMC infusion as a comparison. Clinical symptoms and their correlation with clinical features, laboratory findings, and clinical response were explored.
		                        		
		                        			RESULTS:
		                        			Fever (58.0% [51/88]) and chills (43.2% [38/88]) were the significant early-onset symptoms after GPBMC infusion. Patients possessing less human leukocyte antigen-matching loci with the donor or those with unrelated donors experienced more chills (3 [2-5] loci vs. 5 [3-5] loci, P  = 0.043 and 66.7% [12/18] vs. 37.1% [26/70], P  = 0.024). On the other hand, those with decreased CD4 + /CD8 + T-cell ratio developed more fever (0.8 [0.7-1.2] vs. 1.4 [1.1-2.2], P  = 0.007). Multivariable analysis demonstrated that younger patients experienced more fever (odds ratio [OR] = 0.963, 95% confidence interval [CI]: 0.932-0.995, P  = 0.022), while patients with younger donors experienced more chills (OR = 0.915, 95% CI: 0.859-0.975, P  = 0.006). Elevated ultra-sensitive C-reactive protein levels in the absence of cytokine storm were observed following GPBMC infusion, which indicated mild and transient inflammatory response. Although no predictive value of infusion-related syndrome to leukemia burden change was found, the proportion of host pre-treatment activated T cells was positively correlated with leukemia control.
		                        		
		                        			CONCLUSIONS
		                        			Mismatched GPBMC infusion in MST induced unique infusion-related symptoms and laboratory changes, which were associated with donor- or recipient-derived risk factors, with less safety and tolerance concerns than reported CRS or irAEs.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Leukocytes, Mononuclear
		                        			;
		                        		
		                        			Hematopoietic Stem Cell Transplantation/adverse effects*
		                        			;
		                        		
		                        			Leukemia, Myeloid, Acute/therapy*
		                        			;
		                        		
		                        			Unrelated Donors
		                        			;
		                        		
		                        			Granulocyte Colony-Stimulating Factor
		                        			;
		                        		
		                        			Graft vs Host Disease
		                        			
		                        		
		                        	
5.Optimized treatment of childhood B-lineage acute lymphoblastic leukemia.
Chinese Journal of Contemporary Pediatrics 2023;25(4):344-349
		                        		
		                        			
		                        			Childhood acute lymphoblastic leukemia (ALL) accounts for about 75% of childhood leukemia cases, and B-lineage acute lymphoblastic leukemia (B-ALL) accounts for more than 80% of childhood ALL cases. Over the past half century, new molecular biological targets discovered by new techniques have been used in precise stratification of disease prognosis, and there has been a gradual increase in the 5-year overall survival rate of childhood ALL. With the increasing attention to long-term quality of life, the treatment of childhood B-ALL has been constantly optimized from induction therapy to the intensity of maintenance therapy, including the treatment of extramedullary leukemia without radiotherapy, which has been tried with successful results. The realization of optimized treatment also benefits from the development of new techniques associated with immunology and molecular biology and the establishment of standardized clinical cohorts and corresponding biobanks. This article summarizes the relevant research on the implementation of precise stratification and the intensity reduction and optimization treatment of B-ALL in recent years, providing reference for clinicians.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Quality of Life
		                        			;
		                        		
		                        			Precursor Cell Lymphoblastic Leukemia-Lymphoma/drug therapy*
		                        			;
		                        		
		                        			Prognosis
		                        			;
		                        		
		                        			Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/drug therapy*
		                        			;
		                        		
		                        			Acute Disease
		                        			
		                        		
		                        	
6.Clinical Analysis of SET-NUP214 Fusion Gene Positive Patients with Acute Leukemia.
Yang SONG ; Xiao-Yuan GONG ; Shu-Ning WEI ; Qing-Hua LI ; Guang-Ji ZHANG ; Ying WANG ; Hui WEI ; Dong LIN ; Shang-Zhu LI ; Si-Zhou FENG ; Jian-Xiang WANG ; Ying-Chang MI
Journal of Experimental Hematology 2023;31(2):352-357
		                        		
		                        			OBJECTIVE:
		                        			To analyze the characteristics and prognosis of acute leukemia(AL) with SET-NUP214 fusion gene.
		                        		
		                        			METHODS:
		                        			The clinical data of 17 patients over 14 years old newly diagnosed with SET-NUP214 positive AL admitted in Institute of Hematology and Blood Diseases Hospital from August 2017 to May 2021 were analyzed retrospectively.
		                        		
		                        			RESULTS:
		                        			Among the 17 SET-NUP214 positive patients, 13 cases were diagnosed as T-ALL (ETP 3 cases, Pro-T-ALL 6 cases, Pre-T-ALL 3 cases, Medullary-T-ALL 1 case), AML 3 cases (2 cases M5, 1 case M0) and ALAL 1 case. Thirteen patients presented extramedullary infiltration at initial diagnosis. All 17 patients received treatment, and a total of 16 cases achieved complete remission (CR), including 12 cases in patients with T-ALL. The total median OS and RFS time were 23 (3-50) months and 21 (0-48) months, respectively. Eleven patients received allogeneic hematopoietic stem cell transplantation(allo-HSCT), with median OS time of 37.5 (5-50) months and median RFS time of 29.5 (5-48) months. The median OS time of 6 patients in chemotherapy-only group was 10.5 (3-41) months, and median RFS time of 6.5 (3-39) months. The OS and RFS of patients with transplantation group were better than those of chemotherapy-only group (P=0.038). Among the 4 patients who relapsed or refractory after allo-HSCT, the SET-NUP214 fusion gene did not turn negative before transplantation. While, in the group of 7 patients who have not relapsed after allo-HSCT till now, the SET-NUP214 fusion gene expression of 5 patients turned negative before transplantation and other 2 of them were still positive.
		                        		
		                        			CONCLUSION
		                        			The fusion site of SET-NUP214 fusion gene is relatively fixed in AL patients, often accompanied by extramedullary infiltration. The chemotherapy effect of this disease is poor, and allo-HSCT may improve its prognosis.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Adolescent
		                        			;
		                        		
		                        			Precursor T-Cell Lymphoblastic Leukemia-Lymphoma
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Leukemia, Myeloid, Acute/therapy*
		                        			;
		                        		
		                        			Hematopoietic Stem Cell Transplantation
		                        			;
		                        		
		                        			Acute Disease
		                        			;
		                        		
		                        			Prognosis
		                        			;
		                        		
		                        			Leukemia-Lymphoma, Adult T-Cell/therapy*
		                        			;
		                        		
		                        			Nuclear Pore Complex Proteins
		                        			
		                        		
		                        	
7.Efficacy and Safety of Allogeneic Hematopoietic Stem Cell Transplantation with Decitabine-containing Regimen in Myelodysplastic Syndromes and Myelodysplastic Syndromes Transformed Acute Myeloid Leukemia.
Yu-Xin WANG ; Yao SUN ; Jing XIE ; Na LIU ; Jiang-Wei HU ; Zhuo-Qing QIAO ; San-Chun LAN ; Long ZHAO ; Yang YANG ; Yu-Hang LI ; Bin ZHANG ; Liang-Ding HU
Journal of Experimental Hematology 2023;31(2):522-531
		                        		
		                        			OBJECTIVE:
		                        			To evaluate the efficacy and safety of allogeneic hematopoietic stem cell transplantation (allo-HSCT) with decitabine (Dec)-conditioning regimen in the treatment of myelodysplastic syndrome (MDS) and MDS transformed acute myeloid leukemia (MDS-AML).
		                        		
		                        			METHODS:
		                        			The characteristics and efficacy data of 93 patients with MDS and MDS-AML who received allo-HSCT in our center from April 2013 to November 2021 were retrospectively analyzed. All patients were administered by myeloablative conditioning regimen containing Dec (25 mg/m2 /d×3 d).
		                        		
		                        			RESULTS:
		                        			Among the 93 patients, 63 males and 30 females, were diagnosed as MDS(n =77), MDS-AML(n =16). The incidence of I/II grade regimen-related toxicity (RRT) was 39.8%, and III grade RRT was only found in 1 patient (1%). Neutrophil engraftment was successful in 91 (97.8%) patients after a median neutrophil engraftment time of 14 (9-27) days; Successful platelet engraftment was achieved in 87 (93.5%) patients, with a median engraftment time of 18 (9-290) days. The incidence of acute graft versus host disease(aGVHD) and grade III-IV aGVHD was 44.2% and 16.2%, respectively. The incidence of chronic graft versus host disease(cGVHD) and moderate-to-severe cGVHD was 59.5% and 37.1%, respectively. Of the 93 patients, 54 (58%) developed posttransplant infections, among which lung infection (32.3%) and bloodstream infection (12.9%) were the most common. The median follow-up after transplantation was 45 (0.1-108) months. The 5-year overall survival (OS) rate, disease-free survival (DFS) rate, treatment-related mortality, and cumulative incidence of relapse were 72.7%, 68.4%, 25.1%, and 6.5%, respectively. And the 1-year graft-versus-host disease/relapse-free survival rate was 49.3%. The patients in different group of relative high-risk prognostic scoring or low-risk prognostic scoring, with or without poor-risk mutation(s), with mutations number ≥3 or <3 had similar 5-year OS rate (more than 70%). Multivariate analysis showed that the incidence of grade III-IV aGVHD was the independent risk factor affecting OS(P =0.008)and DFS (P =0.019).
		                        		
		                        			CONCLUSION
		                        			Allo-HSCT with Dec-conditioning regimen is feasible and effective in the treatment of patients with MDS and MDS-AML, especially those in high prognostic risk and with poor-risk mutations.
		                        		
		                        		
		                        		
		                        			Male
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Decitabine
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Transplantation, Homologous/adverse effects*
		                        			;
		                        		
		                        			Transplantation Conditioning/adverse effects*
		                        			;
		                        		
		                        			Myelodysplastic Syndromes/complications*
		                        			;
		                        		
		                        			Leukemia, Myeloid, Acute/therapy*
		                        			;
		                        		
		                        			Hematopoietic Stem Cell Transplantation/adverse effects*
		                        			;
		                        		
		                        			Chronic Disease
		                        			;
		                        		
		                        			Graft vs Host Disease/therapy*
		                        			;
		                        		
		                        			Recurrence
		                        			
		                        		
		                        	
8.The Relationship between Occurrence of aGVHD in Patients with Acute Myeloid Leukemia after Allogeneic Hematopoietic Stem Cell Transplantation and Immune Cell Components in Graft.
Shuo LIU ; Zheng ZHOU ; Wen-Jing ZHAI ; Xi-Na SONG ; Qiang LI ; Er-Lie JIANG ; Si-Zhou FENG ; Jia-Li SUN
Journal of Experimental Hematology 2023;31(2):539-545
		                        		
		                        			OBJECTIVE:
		                        			To explore the relationship between occurrence of acute graft-versus-host disease (aGVHD) and various immune cell composition in patients with acute myeloid leukemia (AML) after allogeneic hematopoietic stem cell transplantation (allo-HSCT).
		                        		
		                        			METHODS:
		                        			The clinical data of 104 patients with AML undergoing allo-HSCT in our hospital were retrospectively analyzed, and the hematopoietic reconstitution and occurrence of GVHD were analyzed. Flow cytometry was used to detect the proportion of various types of immune cells in the grafts, the number of graft composition in patients with different degrees of aGVHD was calculated and compared, and to analyze the correlation between the severity of aGVHD in AML patients after allo-HSCT and the immune cell components in the graft.
		                        		
		                        			RESULTS:
		                        			There was no significant difference in the time of hematopoietic reconstitution between the high number group of total number of nucleated cells (TNC) and the low number group, while the time of neutrophil and platelet reconstruction in the high number of CD34 group was significantly faster than that in the low number of CD34 group (P<0.05), and the total hospital stay also tends to be shorten. Compared with patients in 0-Ι aGVHD group, both HLA-matched and HLA-haploidentical transplantation, the infusion amounts of CD3+ cells, CD3+CD4+ cells, CD3+CD8+ cells, NK cells and CD14+ monocytes were higher in patients of Ⅱ-Ⅳ aGVHD group, but the difference was not statistically significant (P>0.05); In addition, in patients with HLA-haploidentical transplantation, the number of CD4+CD25+ cells in Ⅱ-Ⅳ aGVHD group was significantly lower than that in 0-Ι aGVHD group (P<0.05), and the same trend was also observed in HLA-matched transplanted patients, but the difference was not significant (P=0.078).
		                        		
		                        			CONCLUSION
		                        			High number of CD34+ cells in the graft is beneficial to hematopoietic reconstitution in AML patients. To a certain degree, high number of CD3+ cells, CD3+CD4+ cells, CD3+CD8+ cells, NK cells and CD14+ cells tend to increase the occurrence of aGVHD, but high number of CD4+CD25+ regulatory T cells is beneficial to reduce the incidence of aGVHD in AML patients.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Hematopoietic Stem Cell Transplantation/adverse effects*
		                        			;
		                        		
		                        			CD4-Positive T-Lymphocytes
		                        			;
		                        		
		                        			Leukemia, Myeloid, Acute/complications*
		                        			;
		                        		
		                        			Graft vs Host Disease
		                        			
		                        		
		                        	
9.Research Progress of Next Generation Sequencing in Acute Leukemia --Review.
Wei-Ling CHEN ; Zhong GUO ; Zhi-Zhong HOU ; Yi-Jian CHEN
Journal of Experimental Hematology 2023;31(2):612-615
		                        		
		                        			
		                        			With the advent of precision medicine, next-generation sequencing (NGS) is playing an increasingly important role in clinical oncology diagnosis and treatment with its advantages of high sensitivity, high accuracy, high efficiency and operability. NGS reveals the genetic characteristics of acute leukemia(AL) patients by screening for specific disease-causing genes to identify occult as well as complex genetic mutations in patients with AL, leading to early diagnosis and targeted drug therapy for AL patients, as well as to predict disease recurrence by detecting mnimal residual disease (MRD) and analyzing mutated genes to determine patient prognosis. NGS plays an increasingly important role in the diagnosis, treatment and prognosis assessment in AL, providing a direction for the pursuit of precision medicine. This paper reviews the research progress of NGS in AL.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			High-Throughput Nucleotide Sequencing
		                        			;
		                        		
		                        			Leukemia, Myeloid, Acute/genetics*
		                        			;
		                        		
		                        			Acute Disease
		                        			;
		                        		
		                        			Mutation
		                        			;
		                        		
		                        			Recurrence
		                        			;
		                        		
		                        			Neoplasm, Residual/genetics*
		                        			
		                        		
		                        	
10.Efficacy of CLAE Chemotherapy Regimen Followed by Allogeneic Hematopoietic Stem Cell Transplantation in Patients with Relapsed/Refractory Acute Leukemia.
Shan-Dong TAO ; Li-Xiao SONG ; Yuan DENG ; Yue CHEN ; Xin ZHANG ; Bang-He DING ; Chun-Ling WANG ; Liang YU
Journal of Experimental Hematology 2023;31(3):677-684
		                        		
		                        			OBJECTIVE:
		                        			To observe the efficacy and safety of CLAE intensive chemotherapy followed by allogeneic hematopoietic stem cell transplantation (allo-HSCT) in patients with relapsed/refractory acute leukemia (R/R AL).
		                        		
		                        			METHODS:
		                        			CLAE regimen [cladribine 5 mg/(m2·d), d 1-5; cytarabine 1.5 g/(m2·d), d 1-5; etoposide 100 mg/(m2·d), d 3-5] followed by allo-HSCT was used to treat 3 R/R AL patients. The patients received CLAE chemotherapy in relapsed or refractory status and underwent bone marrow puncture to judge myelodysplastic state. After an interval of 3 to 5 days, followed by preconditioning regimen for allo-HSCT [fludarabine 30 mg/(m2·d), d -7 to d -3; busulfan 0.8 mg/kg q6h, d -6 to d -3 or d -5 to d -2. If the bone marrow hyperplasia was not active and the blasts were less than 10%, busulfan should be used for 3 days. If the bone marrow hyperplasia was active and the blasts were more than 10%, busulfan should be used for 4 days]. Cyclosporin A, mycophenolate mofetil and short-term methotrexate were used for graft-versus-host disease (GVHD) prevention. After transplantation, the status of minimal residual disease (MRD) and bone marrow chimerism were regularly monitored in all 3 patients, and demethylation drugs or dasatinib were used to prevent recurrence 3 months after transplantation.
		                        		
		                        			RESULTS:
		                        			2 patients with t(11;19) translocation and relapse/refractory acute myeloid leukemia recurred within 6 months after induction of remission, and received intensive chemotherapy with CLAE regimen followed by haploidentical allo-HSCT and unrelated donor allo-HSCT, respectively. The two patients both relapsed 6 months after transplantation, then achieved complete remission by donor lymphocyte infusion, interferon, interleukin-2 and other methods, and disease-free survival was 2 years after transplantation. The other patient was chronic myelogenous leukemia who developed acute lymphoblastic leukemia during oral administration of tyrosine kinase inhibitor, accompanied by T315I and E255K mutations in ABL1 kinase region and additional chromosomal abnormalities. After morphological remission by induction chemotherapy, central nervous system leukemia was complicated. Intensive chemotherapy with CLAE regimen followed by sibling allo-HSCT was performed in the positive state of MRD. The patient relapsed 3 months after transplantation, and achieved remission after chimeric antigen receptor T-cell (CAR-T) therapy, however, he died 5 months after transplantation because of severe cytokine release syndrome (CRS) and GVHD.
		                        		
		                        			CONCLUSION
		                        			CLAE regimen followed by allo-HSCT may be an effective salvage treatment option for R/R AL patients to prolong the overall survival.
		                        		
		                        		
		                        		
		                        			Male
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Busulfan/therapeutic use*
		                        			;
		                        		
		                        			Hematopoietic Stem Cell Transplantation/adverse effects*
		                        			;
		                        		
		                        			Treatment Outcome
		                        			;
		                        		
		                        			Leukemia, Myeloid, Acute/etiology*
		                        			;
		                        		
		                        			Acute Disease
		                        			;
		                        		
		                        			Graft vs Host Disease/prevention & control*
		                        			
		                        		
		                        	
            
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