Multicentric Reticulohistiocytosis
- Author: Jeffrey P Callen, MD; Chief Editor: Herbert S Diamond, MD more...
Background
In 1954, Goltz and Laymon coined the term multicentric reticulohistiocytosis (MRH) to describe patients with destructive arthritis and multiple cutaneous nodules that histologically manifest as an infiltrate of histiocytic multinucleated giant cells with eosinophilic ground-glass cytoplasm.[1] This is a rare condition; fewer than 200 cases have been reported in the world literature. Various diseases have been associated with MRH, including malignancy.[2]
Pathophysiology
The pathogenesis of this condition is unknown but probably has an immunologic basis. Some studies have demonstrated increased levels of tumor necrosis factor (TNF)–alpha in the blood and in the tissue.[3, 4]
Epidemiology
Frequency
United States
MRH is a very rare condition, and no studies have detailed the prevalence in the general population.
International
MRH is a rare condition.
Mortality/Morbidity
MRH is a debilitating process but rarely causes death unless the patient has an associated malignancy.
Race
MRH has been reported primarily in whites.
Sex
Women are affected more commonly than men, with a female-to-male ratio of 2:1.
Age
MRH may occur at any age, but it has been reported primarily in middle-aged adults, with a mean age of 43 years.
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