View source for Hemophagocytic lymphohistiocytosis overview

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==Overview==
'''Hemophagocytic lymphohistiocytosis''' (HLH) is an uncommon [[hematologic disorder]] in which the immune system produces too many activated immune cells ([[lymphocytes]]) called [[T cells]], [[natural killer cells]], [[B cells]], and [[macrophages]] ([[histiocytes]]).  Excessive amounts of immune system proteins called [[cytokines]] are also produced.

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[[Category:Disease]]
[[Category:Pediatrics]]
[[Category:Hematology]]

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