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Clin Immunol. 2014 Nov;155(1):118-25. doi: 10.1016/j.clim.2014.09.008. Epub 2014 Sep 18.

Hemophagocytic lymphohistiocytosis and primary immune deficiency disorders.

Author information

1
Division of Immunology and Allergy, Department of Pediatrics, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada.
2
Division of Immunology and Allergy, Department of Pediatrics, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada. Electronic address: eyal.grunebaum@sickkids.ca.

Abstract

Hemophagocytic lymphohistiocytosis (HLH) is characterized by uncontrolled immune activation and is traditionally associated with inherited gene defects or acquired causes. In addition to abnormalities in cytotoxic granules and lysosomes, various primary immune deficiency disorders (PID) have been identified among patients suffering from HLH. Our purpose was twofold: to better characterize and detail the association between PID and HLH. We found that HLH occurs infrequently among patients with PID, particularly those suffering from abnormalities that impair T cell function. The prognosis of patients suffering from PID and HLH is poor, emphasizing the need for rapid clinical and genetic diagnosis of the PID as well as initiation of appropriate management of the HLH, including allogeneic hematopoietic stem cell transplantations. The association of HLH and PID implicates abnormal T cell function as an important factor in HLH development. It also suggests that the partition of HLH into genetic versus acquired forms might be misleading.

KEYWORDS:

Deficiency; Hemophagocytic;; Immune;; Lymphohistiocytosis;; Primary;

PMID:
25241079
DOI:
10.1016/j.clim.2014.09.008
[Indexed for MEDLINE]

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