Preferred Label : Hemophagocytic lymphohistiocytosis, familial, 1;
Symbol : FHL1;
CISMeF acronym : FEL; FHL; FHLH; FHL1; HLH1; HPLH; HPLH1;
Type : Phenotype or locus, molecular basis unknown;
Alternative titles and symbols : FEL; HLH1; Erythrophagocytic lymphohistiocytosis, familial; Hemophagocytic reticulosis, familial; Reticulosis, familial histiocytic; FHLH; HPLH; Hemophagocytic lymphohistiocytosis, familial; HPLH1; FHL;
Description : Zur Stadt et al. (2005) summarized the clinical features of hemophagocytic lymphohistiocytosis
(HLH), a rare autosomal recessive disorder characterized by massive infiltration of
several organs by activated lymphocytes and macrophages. The clinical features of
the disease include fever, hepatosplenomegaly, cytopenia, and less frequently central
nervous system involvement. In FHL, the familial form of the disease, first episodes
occur mostly during infancy, with a rapidly fatal outcome if untreated. Diagnostic
criteria also include low fibrinogen and high triglyceride and ferritin levels. Chemoimmunotherapy
based on corticosteroids, epipodophyllotoxins, and cyclosporin succeeds in controlling
the disease in the majority of patients, although remission is rarely obtained (Henter
et al., 2002). Most patients suffer an early death unless they are treated by hematopoietic
stem cell transplantation (Durken et al., 1999). - Genetic Heterogeneity of Familial
Hemophagocytic Lymphohistiocytosis Familial hemophagocytic lymphohistiocytosis exhibits
genetic heterogeneity. In some families, familial hemophagocytic lymphohistiocytosis
has been found to be linked to chromosome 9q (HPLH1, FHL1). FHL2 (603553) is caused
by mutation in the PRF1 gene (170280), which maps to 10q22, and FHL3 (608898) is caused
by mutation in the UNC13D gene (608897), which maps to 17q25.1. FHL4 (603552) is caused
by mutation in the syntaxin-11 gene (STX11; 605014), and FHL5 (613101) is caused by
mutation in the syntaxin-binding protein-2 (STXBP2; 601717), which is an interaction
partner of STX11. Furthermore, before the definition of mutations in the RAG1 (179615)
and RAG2 (179616) genes, both of which map to 11p, Omenn syndrome (familial reticuloendotheliosis
with eosinophilia; 603554) was not thought to be clearly distinct from other reported
cases of hemophagocytic lymphohistiocytosis. Further genetic heterogeneity in familial
hemophagocytic lymphohistiocytosis was suggested by a study in which FHL in 2 unrelated
Canadian families with affected first cousins was not linked to 9q21.3-q22 or 10q21-q22
(Graham et al., 2000).;
Inheritance : Autosomal recessive;
Laboratory abnormalities : Hypertriglyceridemia; CSF pleocytosis, particularly of lymphocytes; Increased protein in CSF; Increased LDL; Hypofibrinogenemia; Increased alanine aminotransferase; Increased total bilirubin; Hyponatremia; Hypoproteinemia; Hypoalbuminemia; Prolonged prothrombin time; Increased serum ferritin level; Increased VLDL; Decreased HDL;
Prefixed ID : %267700;
Origin ID : 267700;
UMLS CUI : C4551514;
Automatic exact mappings (from CISMeF team)
Broader ORDO disease(s)
Currated CISMeF NLP mapping
DO Cross reference
HPO term(s)
ORDO concept(s)
Semantic type(s)
UMLS correspondences (same concept)
Validated automatic mappings to NTBT