Multicentric Reticulohistiocytosis Clinical Presentation
- Author: Jeffrey P Callen, MD; Chief Editor: Herbert S Diamond, MD more...
History
- The primary manifestations of multicentric reticulohistiocytosis (MRH) are joint and skin diseases.
- Inflammatory joint disease is a frequent presenting symptom, and it is the sole symptom in 45% of patients.
- Skin disease is common, and it is the presenting manifestation in 30% of patients.
Physical
- The joint disease usually manifests as destructive and deforming symmetrical polyarthritis with a predilection for the distal interphalangeal joints.
- The classic skin lesions are multiple nodules that have a predilection for the hands, particularly the base of the nails, but they may occur on any body surface.
- The lesions are usually nontender.
- The nodules may be skin colored, red, or yellowish.
- They vary in size from 1-10 mm and can coalesce to form plaques with a cobblestone surface.
- Some patients also have a xanthelasma.
- The nodules grow slowly, and they rarely ulcerate.
- Infiltrated plaques may resemble mucinosis.
- Some patients appear to have a photodistribution of lesions simulating dermatomyositis.[5]
Multiple erythematous nodules are present on the dorsal hands of this adolescent with an inflammatory arthropathy.
Multiple erythematous to brown nodules on the fingers.
Erythematous, poikilodermatous mamillated plaque on the anterior chest.
Causes
The cause of MRH is unknown, but various associated diseases have been reported in patients with MRH.
- Malignancy has been reported in multiple patients (perhaps as many as 25%).
- No specific site or type of malignancy has been reported.
- Those reported include melanoma, sarcoma, leukemia, lymphoma, and carcinomas (usually adenocarcinoma) of the breast,[6] colon, bronchus, cervix, stomach, and ovaries.
- Various endocrinopathies have been reported, including diabetes mellitus and hypothyroidism.
- Other associated conditions include rheumatoid arthritis, systemic lupus erythematosus, Sjögren syndrome, primary biliary cirrhosis, and pregnancy.
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