Haemophagocytic syndrome associated with infections: Not so uncommon

Background Haemophagocytic syndrome (HPS) is a severe immunological disorder characterized by uncontrolled inflammation and multiple organ failure. HPS can be triggered by viral, bacterial, fungal and parasitical infections. We report our experience with infection-related HPS and estimate its local incidence. Material and method We conducted an observational retrospective study of infection-associated HPS in patients treated in the Department of Infectious Diseases of a university hospital within a 5-year period, as well as a review of the published series in Europe. Results HPS was associated with infection by cytomegalovirus in 2 women with Crohn's disease and was associated with visceral leishmaniosis in 4 patients (3 men, 1 woman; 1 case of multiple myeloma; 2 cases of solid tumors; 1 case of no apparent disease). Two patients died, and the estimated incidence rate was 0.58/100,000 inhabitants/year. The published series are mixed. Conclusions Infection-related HPS must be more common than reported. The geographical environment can influence the triggering infections (in our environment, Leishmania should be considered).