from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of several abnormal conditions characterized by the appearance of histiocytes in the blood or tissues.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An excess of histiocytes, associated with various rare diseases.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a blood disease characterized by an abnormal multiplication of macrophages
Sorry, no etymologies found.
Of note, according Kallen and colleagues, there were 6 cases of a rare white blood cell disorder called histiocytosis (against 1 expected).
And in doing so they have also told the rare disease community with truly rare diseases such as histiocytosis which affects 1 in 200,000 or apx 1600 americans that we have no hope to find cures for our children because it is too rare to matter.
Langerhans cell histiocytosis (LCH) Histiocytosis is a rare blood disease that is caused by an excess of white blood cells called histiocytes.
Max 2 years since feb 2008, has been diagnosed with Langerhans cell histiocytosis
"We do not understand the apparently increased risk for histiocytosis," Kallen told Reuters
In histiocytosis, these cells accumulate on bones and other parts of the body, particularly the head and neck, causing a wide range of problems.
There were 12 cases of various solid cancers and a half-dozen instances of Langerhand histiocytosis -- six times the amount expected prior to the research.
In the first two years, the project also will study osteosarcoma, oral melanoma, malignant histiocytosis, and non-Hodgkin lymphoma.
Langerhans' cell histiocytosis (LCH) a rare disorder of the dendritic (immune-system) cells, mortality in children with advanced disease has dropped from 25 to 0 per cent in the past five years.
Ohga S, Aoki T, Yamada S, Sako M, et al. (1991) Prognosis of children with virus-associated hemophagocytic syndrome and malignant histiocytosis: correlation with levels of serum interleukin-1 and tumor necrosis factor.