Multicentric reticulohistiocytosis is a rare multisystemic condition associated with papulonodular skin lesions, severe arthritis and malignancy. Histopathology shows histiocytes containing abundant eosinophilic ground glass cytoplasm and multinucleated giant cells. Early recognition, age-appropriate malignancy work-up and treatment is important to prevent impairment of daily life activity.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10460929PMC
http://dx.doi.org/10.1002/ccr3.7846DOI Listing

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Multicentric reticulohistiocytosis is a rare multisystemic condition associated with papulonodular skin lesions, severe arthritis and malignancy. Histopathology shows histiocytes containing abundant eosinophilic ground glass cytoplasm and multinucleated giant cells. Early recognition, age-appropriate malignancy work-up and treatment is important to prevent impairment of daily life activity.

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The authors report the case of a patient who had both multicentric reticulohistiocytosis--a systemic disease characterized by symmetric polyarthritis and papulonodular skin lesions--and an ovarian adenocarcinoma. Synovial fluid analysis found histiocytes with a ground-glass cytoplasm, binucleate giant cells, and undifferentiated cells undergoing mitosis. PAS-positive, diastase-resistant cells similar to the synovial fluid histiocytes were seen in the synovial and cutaneous biopsy specimens.

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The synovium and synovial fluid have been studied in a patient with multicentric reticulohistiocytosis. Previously unreported histochemical, immunocytochemical and ultrahistochemical findings are presented and their relevance to the aetiology and pathogenesis are discussed. The synovial fluid analysis in this disease is characteristic and may be helpful in its early diagnosis.

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