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INTRODUCTION
POEMS syndrome (Polyneuropathy, Organomegaly, Endocrinopathy, Monoclonal protein, Skin changes) is characterized by the presence of a monoclonal plasma cell disorder, peripheral neuropathy, and one or more of the following features: osteosclerotic myeloma, Castleman's disease, increased levels of serum vascular endothelial growth factor (VEGF), organomegaly, endocrinopathy, edema, typical skin changes, and papilledema [1].
The clinical features, diagnosis, and treatment of POEMS syndrome will be discussed here. A discussion of Castleman's disease is presented separately. (See "Castleman's disease".)
HISTORICAL BACKGROUND
In 1938, a patient was described with sensorimotor peripheral neuropathy, hyperpigmentation, elevated cerebrospinal fluid protein, and a solitary plasmacytoma [2]. Eighteen years later, two patients were reported with peripheral neuropathy, hyperpigmentation, elevation of cerebrospinal fluid protein, and plasmacytomas with new bone formation [3]. In 1980 the acronym "POEMS" was suggested for this disorder, representing the following constellation of findings [4]:
Additional features described in this syndrome include sclerotic bone lesions, Castleman's disease, papilledema, pleural effusion, edema, ascites, erythrocytosis, and thrombocytosis. This disorder has also been called osteosclerotic myeloma, Crow-Fukase syndrome, PEP syndrome (plasma cell dyscrasia, endocrinopathy, polyneuropathy), or Takatsuki syndrome. The complex interrelationships among POEMS syndrome, osteosclerotic myeloma, and Castleman's disease are still being investigated.
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