Castleman disease in an 11-year-old girl appeared as a neck mass that grew despite antibiotic treatment. MR showed a well-defined solid mass, isointense with muscle on short-repetition-time/short-echo-time images, with a stellate area of central hypointensity on long-repetition-time/long-echo-time images, that did not enhance with gadolinium.

Macrophage Activating Syndrome (MAS) is a life-threatening disease seen in autoimmune diseases including lupus erythematosus, rheumatoid arthritis, Still's disease, polyarteritis nodosa. It is characterized by fever, pancytopenia, liver failure, coagulopathy, and neurologic symptoms and high serum ferritin. A 27 yr. old female patient was admitted in shahid Mostafa Khomeini Hospital (Tehran-Ira...

POEMS syndrome is a paraneoplastic syndrome whose acronym stands for less than half of the defining features of the disease, that is, polyradiculoneuropathy, organomegaly, potentially including coexisting Castleman disease, endocrinopathy, monoclonal plasma cell neoplasm, and skin changes. The other important features include papilledema, extravascular volume overload, sclerotic bone lesions, t...