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Chédiak-Higashi syndrome

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1 reference results for: Chediak-Higashi syndrome

Wikipedia

Chédiak-Higashi syndrome is a rare autosomal recessive disorder that affects multiple systems of the body, and arises from a mutation in the lysosomal trafficking regulator gene, LYST. It occurs in humans, cattle, white tigers, blue Persian cats and orcas.

Eponym

It is named for Alexander Chédiak and Otokata Higashi.

Presentation

It is a disease with impaired bacteriolysis due to failure of phagolysosome formation. As a result of disordered intracellular trafficking there is impaired lysosome degranulation with phagosomes, so phagocytosed bacteria are not destroyed by the lysosome's enzymes.

In addition, secretion of lytic secretory granules by cytotoxic T cells is also affected.

The disease is characterised by large lysosome vesicles in phagocytes (neutrophils), which thus have poor bactericidal function, leading to susceptibility to infections, abnormalities in nuclear structure of leukocytes, anemia, and hepatomegaly.

Clinical findings

There are several manifestations of Chédiak-Hegashi syndrome as mentioned above; however, neutropenia seems to be the most common. The syndrome is also associated with oculocutaneous albinism. Persons are also prone for infections, especially with Staphylococcus aureus.

Associated features: Abnormalities in melanocytes (albinism), nerve defects, bleeding disorders.