Disorders of adaptive immunity [DS:H02526] Primary immunodeficiency disease [DS:H01725]
Description
Familial hemophagocytic lymphohistiocytosis (FHL) is an autosomal recessive disorder with uncontrolled activation of T cells and macrophages (hemophagocytic activation) that infiltrate into liver, spleen, bone marrow, and CNS. The symptoms include fever, hepatosplenomegaly, and cytopenia. Homozygous and heterozygous gene mutations of perforin, the major immune cytotoxic protein, were detected with frequency between 15% and 50% of all FHPL patients. UNC13D is the second gene associated with FHPL. The encoded protein (Munc13-4) is important for cytolytic granule exocytosis. Recently a third FHPL associated gene on chromosome 6q24 with mutations in STX11 was identified. The encoded protein, t-SNARE syntaxin 11, also plays a role in intracellular trafficking, but its precise role is not known.
Category
Primary immunodeficiency
Brite
Human diseases in ICD-11 classification [BR:br08403]
04 Diseases of the immune system
Primary immunodeficiencies
4A01 Primary immunodeficiencies due to disorders of adaptive immunity
H00109 Familial hemophagocytic lymphohistiocytosis
Primary immunodeficiency diseases: an update from the International Union of Immunological Societies Primary Immunodeficiency Diseases Classification Committee.
