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Woodward G, Drasar E, Pancham S, Sadasivam N, Thachil J, Brewin J. Prevention and management of indwelling catheter-related thrombosis in sickle cell disease and thalassaemia: A British Society for Haematology Good Practice Paper. Br J Haematol 2024. [PMID: 39086097 DOI: 10.1111/bjh.19650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Accepted: 07/06/2024] [Indexed: 08/02/2024]
Affiliation(s)
- George Woodward
- University College London Hospitals NHS Foundation Trust, London, UK
| | - Emma Drasar
- University College London Hospitals NHS Foundation Trust, London, UK
| | - Shivan Pancham
- Sandwell and West Birmingham NHS Foundation Trust, Birmingham, UK
| | | | - Jecko Thachil
- Manchester University NHS Foundation Trust, Manchester, UK
| | - John Brewin
- King's College Hospital NHS Foundation Trust, London, UK
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Hu J, Zhou Y. The association between lactate dehydrogenase to serum albumin ratio and in-hospital mortality in patients with pulmonary embolism: a retrospective analysis of the MIMIC-IV database. Front Cardiovasc Med 2024; 11:1398614. [PMID: 38962086 PMCID: PMC11220285 DOI: 10.3389/fcvm.2024.1398614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Accepted: 05/27/2024] [Indexed: 07/05/2024] Open
Abstract
Background Lactate dehydrogenase (LDH) and albumin (ALB) were found to be significantly correlated with mortality in pulmonary embolism (PE) patients. However, data regarding the LDH/ALB ratio (LAR) in patients with acute PE are scanty. Therefore, the aim of this study was to investigate the association between LAR and the risk of mortality in patients with acute PE. Methods A retrospective cohort study was conducted on patients with acute PE represented in the Medical Information Mart for Intensive Care IV (MIMIC-IV). A receiver operating characteristic (ROC) curve analysis and calibration curve were used to assess the accuracy of the LAR for predicting mortality in patients with acute PE. We utilized Cox regression analysis to determine adjusted hazard ratios (HR) and 95% confidence interval (CI). Survival curves were used to evaluate a connection between the LAR and prognosis in patients with acute PE. Results The study comprised 581 patients, and the 30-day all-cause mortality rate was 7.7%. We observed a higher LAR in the non-survival group compared to the surviving group (21.24 ± 21.22 vs. 8.99 ± 7.86, p < 0.0001). The Kaplan-Meier analysis showed that patients with an elevated LAR had a significantly lower likelihood of surviving the 30-day mortality compared to those with a low LAR. Cox regression analysis showed that LAR (HR = 1.04, 95% CI: 1.03-1.05) might have associations with 30-day mortality in patients with acute PE. This result was supported by sensitivity analyses. According to the results of the ROC curve analysis, the LAR's prediction of 30-day mortality in patients with acute PE yielded an area under the ROC curve of 0.73. A calibration curve showed LAR is well calibrated. Conclusion Our research suggests LAR monitoring may be promising as a prognostic marker among patients with acute PE.
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Affiliation(s)
| | - Yidan Zhou
- Department of Emergency Medicine, Hangzhou Third People’s Hospital, Hangzhou, China
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Alkindi S, Al-Jadidi S, Al-Adawi S, Elsadek RA, Al Madhani A, Al-Nabhani M, Pathare AV. Multi-center study on mortality in children, and adults with sickle cell anemia-risk factors and causes of death. Sci Rep 2024; 14:8584. [PMID: 38615021 PMCID: PMC11016086 DOI: 10.1038/s41598-024-58328-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 03/27/2024] [Indexed: 04/15/2024] Open
Abstract
Sickle cell disease (SCD) is a major public health burden worldwide with increasing morbidity and mortality. The study evaluates the risk factors associated with mortality in SCD patients, between the years 2006 and 2020 at three hospitals in Oman. The analysis includes clinical manifestations, haematological, biochemical, and radiological parameters, use of antibiotics, and blood and exchange transfusions. Our cohort included 123 patients (82 males, 41 females), with a median age of 27 (Interquartile Range 21-35 years). SCD related complications included acute chest syndrome (ACS) in 52.8%, splenic sequestration in 21.1%, right upper quadrant syndrome in 19.5%, more than > 6 VOC/year in 17.9%, and stroke in 13.8%. At the terminal admission, patients had cough, reduced O2 saturation, crepitation and fever in 24.4%, 49.6%, 53.6% and 68.3% respectively. Abnormal chest X-ray and chest CT scan were seen in 57.7%, and 76.4% respectively. Laboratory parameters showed a significant drop in hemoglobin (Hb) and platelet counts from baseline, with a significant rise in WBC, LDH and CRP from baseline (p < 0.05, Wilcoxon Signed Ranks test). All patients received antibiotics, whereas, 95.9% and 93.5% received simple blood transfusions, and exchange transfusions respectively, and 66.6% required non-invasive ventilation. Among the causes of death, ACS is seen in 32 (26%), sepsis in 49 (40%), and miscellaneous in 42 (34%). Sudden death was seen in 32 (26%) of patients. Male gender, with low HbF, rapid drop in Hb and platelet, and increased in WBC, LDH, ferritin, and CRP, correlated significantly with mortality in this cohort.
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Affiliation(s)
- Salam Alkindi
- Department of Haematology, College of Medicine and Health Sciences, Sultan Qaboos University, P. O. Box 35, 123, Muscat, Oman.
| | - Salma Al-Jadidi
- Department of Haematology, College of Medicine and Health Sciences, Sultan Qaboos University, P. O. Box 35, 123, Muscat, Oman
| | - Safa Al-Adawi
- Department of Haematology, College of Medicine and Health Sciences, Sultan Qaboos University, P. O. Box 35, 123, Muscat, Oman
| | | | | | | | - Anil V Pathare
- Department of Haematology, College of Medicine and Health Sciences, Sultan Qaboos University, P. O. Box 35, 123, Muscat, Oman
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Mechraoui A, Ithier G, Pages J, Haouari Z, Ali L, Bonnard A, Benkerrou M, Missud F, Koehl B, Holvoet L, Le Roux E, Brousse V. Early splenectomy in a large cohort of children with sickle cell anemia: risks and consequences. Haematologica 2023; 108:3409-3417. [PMID: 37226714 PMCID: PMC10690920 DOI: 10.3324/haematol.2022.282556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 05/15/2023] [Indexed: 05/26/2023] Open
Abstract
In children with sickle cell anemia (SCA), early splenic complications can require splenectomy, but the benefit-to-risk ratio and the age at which splenectomy may be safely performed remain unclear. To address this question, we analyzed the rate of post-splenectomy events in children with SCA splenectomized between 2000-2018 at the Robert Debré University Hospital, Paris, France. A total of 188 children underwent splenectomy, including 101 (11.9%) from our newborn cohort and 87 referred to our center. Median (Q1-Q3) age at splenectomy was 4.1 years (range 2.5-7.3 years), with 123 (65.4%) and 65 (34.6%) children splenectomized at ≥3 years of age or <3 years of age, respectively. Median postsplenectomy follow-up was 5.9 years (range 2.7-9.2 years) yielding 1192.6 patient-years (PY) of observation. Indications for splenectomy were mainly acute splenic sequestration (101 [53.7%]) and hypersplenism (75 [39.9%]). All patients received penicillin prophylaxis; 98.3% received 23-valent polysaccharic pneumococcal (PPV-23) vaccination, and 91.9% a median number of 4 (range 3-4) pneumococcal conjugate vaccine shots prior to splenectomy. Overall incidence of invasive bacterial infection and thrombo-embolic events were 0.005 / PY (no pneumococcal infections) and 0.003 / PY, respectively, regardless of age at splenectomy. There was an increased proportion of children with cerebral vasculopathy in children splenectomized <3 years of age (0.037 / PY vs. 0.011 / PY; P<0.01). A significantly greater proportion of splenectomized than non-splenectomized children were treated with hydroxycarbamide (77.2% vs. 50.1%; P<0.01), suggesting a more severe phenotype in children who present spleen complications. If indicated, splenectomy should not be delayed in children, provided recommended pneumococcal prophylaxis is available. Spleen complications in childhood may serve as a marker of severity.
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Affiliation(s)
- Aimen Mechraoui
- Centre de Référence MCGRE, Service d'Hématologie-Immunologie, AP-HP, Hôpital Robert Debré, F-75019 Paris
| | - Ghislaine Ithier
- Centre de Référence MCGRE, Service d'Hématologie-Immunologie, AP-HP, Hôpital Robert Debré, F-75019 Paris
| | - Justine Pages
- Clinical Epidemiology Unit, Robert Debré University Hospital, Inserm, CIC 1426, F-75019, Paris
| | - Zinedine Haouari
- Centre de Référence MCGRE, Service d'Hématologie-Immunologie, AP-HP, Hôpital Robert Debré, F-75019 Paris
| | - Liza Ali
- Service de Chirurgie, APHP, Hôpital Universitaire Robert Debré, F-75019 Paris
| | - Arnaud Bonnard
- Service de Chirurgie, APHP, Hôpital Universitaire Robert Debré, F-75019 Paris
| | - Malika Benkerrou
- Centre de Référence MCGRE, Service d'Hématologie-Immunologie, AP-HP, Hôpital Robert Debré, F-75019 Paris, France; Inserm, UMR-1123 ECEVE, Université Paris Cité, Paris
| | - Florence Missud
- Centre de Référence MCGRE, Service d'Hématologie-Immunologie, AP-HP, Hôpital Robert Debré, F-75019 Paris
| | - Berengère Koehl
- Centre de Référence MCGRE, Service d'Hématologie-Immunologie, AP-HP, Hôpital Robert Debré, F-75019 Paris, France; Université Paris Cité and Université des Antilles, Inserm, BIGR, F-75015 Paris
| | - Laurent Holvoet
- Centre de Référence MCGRE, Service d'Hématologie-Immunologie, AP-HP, Hôpital Robert Debré, F-75019 Paris
| | - Enora Le Roux
- Clinical Epidemiology Unit, Robert Debré University Hospital, Inserm, CIC 1426, F-75019, Paris, France; Inserm, UMR-1123 ECEVE, Université Paris Cité, Paris
| | - Valentine Brousse
- Centre de Référence MCGRE, Service d'Hématologie-Immunologie, AP-HP, Hôpital Robert Debré, F-75019 Paris, France; Université Paris Cité and Université des Antilles, Inserm, BIGR, F-75015 Paris.
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Ziyadah MS, Mansory EM, Alahwal HM, Bahashwan SM, Almohammadi AT, Radhwi OO, Alghamdi T, Khan SA, Almashjary MN, Barefah AS. Predisposing Factors and Incidence of Venous Thromboembolism among Hospitalized Patients with Sickle Cell Disease. J Clin Med 2023; 12:6498. [PMID: 37892636 PMCID: PMC10607487 DOI: 10.3390/jcm12206498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/09/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
Though patients with sickle cell disease (SCD) are at risk of developing venous thromboembolism (VTE), clear estimates of its incidence and predisposing factors in hospitalized SCD patients are not available. Therefore, this issue was addressed to facilitate an early diagnosis and initiate appropriate prophylactic and treatment strategies. A retrospective observational study was conducted on patients with SCD who were admitted to an academic center in Saudi Arabia over a 10-year period. We identified 1054 admissions of 394 patients with SCD. Of the 3% of patients identified with VTE, 50% experienced pulmonary embolism (PE), 34.3% exhibited deep vein thrombosis (DVT), 6.3% exhibited cerebral vein thrombosis, and 9.4% showed other forms of VTE. In pregnant SCD patients, 6.4% developed a VTE event during their hospital admission. Of the risk factors, high white blood cell count, length of stay, and presence of any additional risk factor for VTE was associated significantly with higher risk of VTE. In our study, this risk seems to be much lower, which is likely attributed to the use of VTE prophylactic strategies implemented in our center. Nevertheless, further studies are needed to establish the ideal prophylactic strategy in patients with SCD.
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Affiliation(s)
- Mohammed S. Ziyadah
- Department of Internal Medicine, Faculty of Medicine, King Abdulaziz University Hospital, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (M.S.Z.); (T.A.)
| | - Eman M. Mansory
- Hematology Department, Faculty of Medicine, King Abdulaziz University Hospital, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (E.M.M.); (H.M.A.); (S.M.B.); (A.T.A.); (O.O.R.)
- Hematology Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Hatem M. Alahwal
- Hematology Department, Faculty of Medicine, King Abdulaziz University Hospital, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (E.M.M.); (H.M.A.); (S.M.B.); (A.T.A.); (O.O.R.)
- Hematology Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Salem M. Bahashwan
- Hematology Department, Faculty of Medicine, King Abdulaziz University Hospital, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (E.M.M.); (H.M.A.); (S.M.B.); (A.T.A.); (O.O.R.)
- Hematology Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Abdullah T. Almohammadi
- Hematology Department, Faculty of Medicine, King Abdulaziz University Hospital, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (E.M.M.); (H.M.A.); (S.M.B.); (A.T.A.); (O.O.R.)
- Hematology Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Osman O. Radhwi
- Hematology Department, Faculty of Medicine, King Abdulaziz University Hospital, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (E.M.M.); (H.M.A.); (S.M.B.); (A.T.A.); (O.O.R.)
- Hematology Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Talal Alghamdi
- Department of Internal Medicine, Faculty of Medicine, King Abdulaziz University Hospital, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (M.S.Z.); (T.A.)
| | - Shahida A. Khan
- Applied Medical Nutrition Group, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Majed N. Almashjary
- Hematology Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Ahmed S. Barefah
- Hematology Department, Faculty of Medicine, King Abdulaziz University Hospital, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (E.M.M.); (H.M.A.); (S.M.B.); (A.T.A.); (O.O.R.)
- Hematology Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
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Sakon C, Nikirk M, O'Brien ARW. Enoxaparin adherence for venous thromboembolism prophylaxis in hospitalized patients with sickle cell disease. Expert Rev Hematol 2023; 16:147-150. [PMID: 36576324 DOI: 10.1080/17474086.2023.2162499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND Venous thromboembolism (VTE) is a common cause of morbidity and mortality in patients with sickle cell disease (SCD). METHODS This retrospective study assessed adherence to prescribed enoxaparin for VTE prophylaxis in adults with SCD while hospitalized. A total of 172 encounters of 72 unique patients were evaluated between 1 January and 31 December 2019. Patients were grouped based on adherence to prescribed enoxaparin. Group 1 received 100% of doses ordered. Group 2 received between 99% and 1% of doses ordered. Group 3 received 0% of doses ordered. RESULTS Only 45 encounters (32.3%) received 100% of ordered doses and 81 encounters (47%) did not receive any of the ordered enoxaparin doses. In total, only 37% of all prescribed enoxaparin doses were administered to patients. CONCLUSION This low level of administered enoxaparin is concerning in a patient population at an increased risk for VTE. VTE prophylaxis adherence needs to be addressed with each admission and, if appropriate, alterative options to enoxaparin should be considered.
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Affiliation(s)
- Colleen Sakon
- Pharmacy Department, Indiana University Health, Indianapolis, Indiana, USA
| | - Miley Nikirk
- Pharmacy Department, Indiana University Health, Indianapolis, Indiana, USA
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Okoye HC, Ezekekwu C, Nwagha TU, Korubo K, Omunakwe HE, Nnachi OC, Madu AJ, Nwogoh B, Efobi CC, Muoghalu EA, Nonyelu C, Okoye AE, Obodo OI, Ugwu CS, Egolum MC, Nnachi OA, Okpala I. Prevalence of venous thromboembolism and its associations in a large racially homogenous population of sickle cell disease patients. Eur J Haematol Suppl 2022; 109:321-326. [PMID: 35687045 DOI: 10.1111/ejh.13811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/26/2022] [Accepted: 05/30/2022] [Indexed: 11/30/2022]
Abstract
To determine the prevalence of venous thromboembolism (VTE) among adult sickle cell disease (SCD) patients in Nigeria. METHODS This was a multicentre retrospective study in which the medical records of adult SCD patients were reviewed. Information on demographics, steady-state haemogram, clinical phenotypes, duration of follow-up, history of VTE including risk factors and management was collected. RESULTS Of the 509 SCD patients with a median (IQR) duration of follow-up of 2 years, 10 (2.0%) had VTE (9 DVT and 1 PE). Their median (IQR) age was 27 (22.8-30.3) years. Identifiable risk factors for VTE included positive family history (2, 20%) surgery, splenectomy, paraplegia and cancer (1, 10% each). No risk factor was identifiable in four persons. VTE had no significant association with age and gender. VTE was significantly associated with the following events: acute chest syndrome [p = .002, odds ratio (OR) 8, 95% CI 2.2-28.9], osteonecrosis [p = .012, OR 5.24, 95% CI, 1.45-18.91] and vaso-occlusive crisis [p = .035]. Also significantly associated with VTE were pulmonary hypertension [p = .001, OR 23.3, 95%CI 5.18-105.06] and stroke [p = .032, OR 9.35, 95%CI 0.87-53.25]. CONCLUSION The prevalence of VTE among SCD patients in Nigeria is low. It is significantly associated with vaso-occlusive crisis, pulmonary hypertension and stroke.
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Affiliation(s)
- Helen Chioma Okoye
- Department of Haematology and Immunology, College of Medicine, University of Nigeria, Enugu, Nigeria.,Department of Haematology and Immunology, University of Nigeria Teaching Hospital, Enugu, Nigeria
| | - Chinedu Ezekekwu
- Department of Haematology and Immunology, College of Medicine, University of Nigeria, Enugu, Nigeria
| | - Theresa Ukamaka Nwagha
- Department of Haematology and Immunology, College of Medicine, University of Nigeria, Enugu, Nigeria.,Department of Haematology and Immunology, University of Nigeria Teaching Hospital, Enugu, Nigeria
| | - Kaladada Korubo
- Department of Haematology and Blood Transfusion, University of Port Harcourt Teaching Hospital, Port Harcourt, Nigeria
| | - Hannah E Omunakwe
- Department of Haematology, Rivers State University Teaching Hospital, Port Harcourt, Nigeria
| | - Oluomachi Charity Nnachi
- Department of Haematology and Blood Transfusion, Alex Ekwueme Federal University Teaching Hospital, Abakaliki, Nigeria
| | - Anazoeze Jude Madu
- Department of Haematology and Immunology, College of Medicine, University of Nigeria, Enugu, Nigeria.,Department of Haematology and Immunology, University of Nigeria Teaching Hospital, Enugu, Nigeria
| | - Benedict Nwogoh
- Department of Haematology, University of Benin Teaching Hospital, Benin City, Nigeria
| | - Chilota Chibuife Efobi
- Department of Haematology and Blood Transfusion, College of Health Sciences, Nnamdi Azikiwe University, Nnewi, Nigeria
| | - Ebele Adaobi Muoghalu
- Department of Haematology and Immunology, University of Nigeria Teaching Hospital, Enugu, Nigeria
| | - Charles Nonyelu
- Department of Haematology and Immunology, College of Medicine, University of Nigeria, Enugu, Nigeria.,Department of Haematology and Immunology, University of Nigeria Teaching Hospital, Enugu, Nigeria
| | - Augustine E Okoye
- Department of Haematology and Blood Transfusion, Alex Ekwueme Federal University Teaching Hospital, Abakaliki, Nigeria
| | - Onochie Ikenna Obodo
- Department of Haematology and Immunology, University of Nigeria Teaching Hospital, Enugu, Nigeria
| | - Chioma Sandra Ugwu
- Department of Haematology and Immunology, University of Nigeria Teaching Hospital, Enugu, Nigeria
| | - Michael C Egolum
- Department of Haematology and Immunology, University of Nigeria Teaching Hospital, Enugu, Nigeria
| | - Oji Anya Nnachi
- Department of Haematology and Blood Transfusion, Alex Ekwueme Federal University Teaching Hospital, Abakaliki, Nigeria
| | - Iheanyi Okpala
- Department of Haematology and Immunology, College of Medicine, University of Nigeria, Enugu, Nigeria.,Department of Haematology and Immunology, University of Nigeria Teaching Hospital, Enugu, Nigeria
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Reduction in Prevalence of Thrombotic Events in Sickle Cell Disease after Allogeneic Hematopoietic Transplantation. Transplant Cell Ther 2022; 28:277.e1-277.e6. [PMID: 35181561 DOI: 10.1016/j.jtct.2022.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 02/05/2022] [Accepted: 02/07/2022] [Indexed: 11/21/2022]
Abstract
Thrombosis is a recognized complication in sickle cell disease (SCD). Allogeneic hematopoietic cell transplantation (allo-HCT) remains the only curative options for patients with severe SCD phenotypes. There is limited data describing the effects of allo-HCT on recurrent thrombotic events (venous and arterial events). We evaluated 31 patients with SCD who have undergone allo-HCT with a median follow up of 34.5 months (range:13-115) post-transplant. No patient continued anticoagulation or anti-platelets after allo-HCT. There was an absolute difference of 32% [95% CI=12.3-32.2, p=0.002] in the prevalence of venous thromboembolic (VTE) events before and after allo-HSCT. In addition, there was an absolute 38.5% [95% CI=10.63-45.96, p=0.006] difference in the number of ischemic cerebrovascular accidents (CVA) before and after allo-HSCT. Patients with severe SCD who undergo allo-HCT are less likely to develop recurrent thrombotic events OR 0.22 [95% CI=0.058 - 0.83, p=0.025] when compared to a control cohort of patients matched for age and genotype. Following curative therapy with allo-HCT, there is a reduction in recurrent arterial and venous thrombosis in patients with severe SCD phenotypes.
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