Session Information
Session Type: ACR Concurrent Abstract Session
Session Time: 4:30PM-6:00PM
Background/Purpose: Hemophagocytic syndrome or hemophagocytic lymphohistiocytosis (HLH) is an increasingly-recognized condition in adults, characterized by a wide range of etiologies, symptoms and outcomes, but with a common etiopathogenic pathway leading to organ damage: an excessive hyperinflammatory response. We analyzed the role of infections as triggers of adult hemophagocytic syndrome in a National Cohort Registry.
Methods: In June 2013, the Study Group on Autoimmune Diseases (GEAS) of the Spanish Society of Internal Medicine created the national registry of patients with HLH. Patients fulfilled the diagnostic guidelines for HLH proposed by the Histiocyte Society in 1991 and updated in 2004. We investigated infections (viruses, bacteria, parasites and fungi) as causative external factors potentially involved in initiate the disease.
Results: On June 15, 2017, a total of 147 patients with HLH were included in the GEAS-SEMI Registry, 87 (59%) men and 60 (41%) women, with a mean age at diagnosis of HLH of 44; 18% were not born in Spain. The main signs and symptoms at presentation consisted of fever in 132 (90%) patients, splenomegaly in 80 (54%), polyadenopathies in 71 (48%) and hepatomegaly in 22 (15%) patients. The main internal organ involvements included pulmonary in 49 (33%) patients, renal in 46 (31%), gastrointestinal in 41 (28%) and CNS in 32 (22%) patients. The main analytical markers consisted of ferritin > 500 ng/mL in 143 (97%, mean 15498 ng/mL), thrombocytopenia <100,000/mm3 in 123 (84%), anemia < 9 g/dL in 106 (72%), and neutropenia <1000/mm3 in 65 (44%). Tissular hemophagocytosis was confirmed in 133/143 (93%) patients. Death occurred in 79 (54%) patients; a higher mortality rate was found in patients with an underlying neoplasia (33% vs 16% in survivals, p=0,023) and in those with severe anemia (85% vs 60%, p=0.001) and thrombocytopenia (95% vs 72%, p<0.001). Mean age at diagnosis was higher in patients who died in comparison with survivors (56.8 vs 42.1 yrs, p<0.001). An infectious trigger was detected in 88 (60%) of patients, mainly viruses in 37 (25%, Epstein-Barr virus infection in 16 cases), bacteria in 23 (16%, mycobacterium infection in 9 cases), fungi in 14 (10%, candida in 5 cases) and parasites in 9 (6%, leishmaniasis in 8 cases).
Conclusion:
The rate of mortality of adult patients diagnosed with hemophagocytic syndrome exceeds 50% of cases, especially in patients with underlying hematological diseases and in those with advanced age. An infection as trigger of the hyperinflammatory response was demonstrated in 60% of cases, with EBV, mycobacterium and leishmanial being the microorganisms more frequently isolated. Active infections in a patient with suspected HLH should always be treated appropriately.
To cite this abstract in AMA style:
Brito-Zerón P, Flores-Chavez A, Moral Moral P, Martínez-Zapico A, Hernández-Jimenez P, Fraile Rodriguez G, Perez Guerrero P, Fonseca E, Robles A, Vaquero Herrero M, Ruiz de Temiño de la Peña A, Forner MJ, Larrañaga JR, Rodriguez Carballeira M, Fernando Viejo Llorente L, Ruiz Muñoz M, Hurtado R, Morcillo C, Retamozo S, Ramos-Casals M. Infection Is the Major Trigger of Adult Hemophagocytic Syndrome, an Orphan Systemic Hyperinflammatory, Life-Threatening Disease: Analysis in 147 Patients (GEAS-SEMI Registry) [abstract]. Arthritis Rheumatol. 2017; 69 (suppl 10). https://acrabstracts.org/abstract/infection-is-the-major-trigger-of-adult-hemophagocytic-syndrome-an-orphan-systemic-hyperinflammatory-life-threatening-disease-analysis-in-147-patients-geas-semi-registry/. Accessed .« Back to 2017 ACR/ARHP Annual Meeting
ACR Meeting Abstracts - https://acrabstracts.org/abstract/infection-is-the-major-trigger-of-adult-hemophagocytic-syndrome-an-orphan-systemic-hyperinflammatory-life-threatening-disease-analysis-in-147-patients-geas-semi-registry/