histiocytosis

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histiocytosis

[‚his·tē·ō‚sī′tō·səs]
(medicine)
Abnormal proliferation of histiocytes, especially in hematopoietic tissues.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Systemic diseases associated with periodontitis with or without premature exfoliation of primary teeth may include Papillon-Lefevre syndrome, hypophosphatasia, leukaemias, Chediak-Higashi syndrome, Langerhan's cell histocytosis, neutropenia and leukocyte adhesion deficiency.
Differential diagnoses included sarcoidosis, histocytosis, or other granulomatous diseases; Erdheim-Chester disease; and lymphocytic hypophysitis, or most likely, a microscopic prolactinoma.
Enda, who suffers from an extremely rare blood disorder called histocytosis, said: "This is the best day of my life."