Multicentric reticulohistiocytosis presenting with papulonodular skin eruption and polyarthritis.

Multicentric reticulohistiocytosis is a rare multisystem disease, presenting with skin lesions and erosive polyarthritis, which is often associated with malignancy. A 2 year untreated natural course of multicentric reticulohistiocytosis, in which the typical nodular skin manifestation of the disease and polyarticular arthritis was present, is described in a 34-year-old lady with no history of major medical disease. Histopathology showed the characteristic histiocytic and multinucleated giant cell infiltrate with ground glass cytoplasm.