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Experience with hemophagocytic lymphohistiocytosis/macrophage activation syndrome at a single institution.
Journal of Pediatric Hematology/oncology 2009 Februrary
BACKGROUND: Hemophagocytic lymphohistiocytosis/macrophage activation syndrome (HLH/MAS) is a serious and potentially life threatening histiocytic disorder in children and adults. The most commonly used protocol-based therapy includes corticosteroids, cyclosporine-A, and etoposide. However, patients are often started on corticosteroid alone with or without the addition of intravenous gamma-globulin. The role of the various therapies in HLH/MAS remains undefined.
OBJECTIVE: To identify patient-related factors that led to the use of full protocol therapy (HLH 1994/2004) and to determine treatment-related factors that were associated with adverse outcome including relapse and death.
DESIGN/METHODS: Patients who were diagnosed with HLH/MAS between January 1998 and December 2005 were included in this study.
RESULTS: Thirty-eight patients had a median age of 9.1 years at diagnosis. Underlying diagnoses were: viral/other 42%; rheumatologic 37%; and malignancy 21%. Initial treatment included corticosteroids 29%; intravenous immunoglobulin (IVIG) 18%; steroids+IVIG 8%; cyclosporine 5%; etoposide 5%; HLH protocol 32%. Etoposide was eventually used in 21% (3/14) of rheumatology and 75% (18/25) viral/other patients. In all, 5/14 (36%) rheumatology and 12/16 (75%) viral/other patients required intensive care unit admission, and 1/14 (7.1%) rheumatology, and 6/16 (38%) viral/other patients died. Three children received a bone marrow transplant. Eleven of 38 (29%) patients died, despite 8 having received etoposide therapy. Three deaths were secondary to underlying malignancy and one from transplant-related complication for malignancy.
CONCLUSIONS: Patients with HLH are at high risk for death early in their disease course. However, corticosteroids and/or IVIG may be sufficient as first-line therapy for patients with underlying rheumatologic disease who present with HLH/MAS. Further prospective studies are required to more precisely define early risk factors for poor outcomes in this often fatal disease.
OBJECTIVE: To identify patient-related factors that led to the use of full protocol therapy (HLH 1994/2004) and to determine treatment-related factors that were associated with adverse outcome including relapse and death.
DESIGN/METHODS: Patients who were diagnosed with HLH/MAS between January 1998 and December 2005 were included in this study.
RESULTS: Thirty-eight patients had a median age of 9.1 years at diagnosis. Underlying diagnoses were: viral/other 42%; rheumatologic 37%; and malignancy 21%. Initial treatment included corticosteroids 29%; intravenous immunoglobulin (IVIG) 18%; steroids+IVIG 8%; cyclosporine 5%; etoposide 5%; HLH protocol 32%. Etoposide was eventually used in 21% (3/14) of rheumatology and 75% (18/25) viral/other patients. In all, 5/14 (36%) rheumatology and 12/16 (75%) viral/other patients required intensive care unit admission, and 1/14 (7.1%) rheumatology, and 6/16 (38%) viral/other patients died. Three children received a bone marrow transplant. Eleven of 38 (29%) patients died, despite 8 having received etoposide therapy. Three deaths were secondary to underlying malignancy and one from transplant-related complication for malignancy.
CONCLUSIONS: Patients with HLH are at high risk for death early in their disease course. However, corticosteroids and/or IVIG may be sufficient as first-line therapy for patients with underlying rheumatologic disease who present with HLH/MAS. Further prospective studies are required to more precisely define early risk factors for poor outcomes in this often fatal disease.
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