Multicentric reticulohistiocytosis

Multicentric reticulohistiocytosis is a rare systemic granulomatous disease of an unknown cause, characterized by distinct histopathology. The skin, mucosa, synovial, bone, and internal organs may be involved. Cutaneous nodules and distinctive arthritis are the most prominent clinical features. A 55-year-old female was referred from Orthopedic Outpatient Department, with multiple, painful and tender nodules on the dorsum of her hands, forearms, elbows, back, and neck. The lesions were present predominantly around the joints with associated arthropathies. Smaller nodules were seen on the ear helices. There was no other clinically evident or investigative abnormality. A histopathological study confirmed the diagnosis of multicentric reticulohistiocytosis.