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Histiocytes are derived from the bone marrow by multiplication from a stem cell. The derived cells migrate from the bone marrow to the blood as monocytes . They circulate through the body and enter various organs, where they undergo differentiation into histiocytes, which are part of the mononuclear phagocytic system (MPS).
Sinus histiocytosis, a common feature in lymph node biopsies, is characterized by dilated sinuses containing variable numbers of histiocytes. [4] Histiocytosis is a rare disease, thus its diagnosis may be challenging. A variety of tests may be used, including: [5] Imaging CT scans of various organs such as lung, heart and kidneys.
The innate immune system is an alternate defense strategy and is the dominant immune system response found in ... macrophages, dendritic cells, histiocytes, ...
HLH is an immune deficiency disorder which happens when certain types of white blood cells, known as histiocytes and lymphocytes, become overactive and attack the body. ... and I found out our ...
A giant cell (also known as a multinucleated giant cell, or multinucleate giant cell) is a mass formed by the union of several distinct cells (usually histiocytes), often forming a granuloma. [1] Although there is typically a focus on the pathological aspects of multinucleate giant cells (MGCs), they also play many important physiological roles.
These cells in combination with lymphocytes, eosinophils, and normal histiocytes form typical LCH lesions that can be found in almost any organ. [5] A similar set of diseases has been described in canine histiocytic diseases. [6] LCH is clinically divided into three groups: unifocal, multifocal unisystem, and multifocal multisystem. [7]
First described in 1961 (where they were simply termed "characteristic granules"), [2] they are solely found in Langerhans cells. [1] Although part of normal Langerhans cell histology, they also provide a mechanism to differentiate Langerhans cell histiocytoses (which are a group of rare conditions collectively known as histiocytoses ) from ...
Malignant histiocytosis is a rare hereditary disease found in the Bernese Mountain Dog and humans, characterized by histiocytic infiltration of the lungs and lymph nodes. The liver, spleen, and central nervous system can also be affected. Histiocytes are a component of the immune system that proliferate abnormally in this disease. In addition ...