List main clinical features of the POEMS syndrome.
POEMS is an acronym for the main clinical features of the syndrome, namely, Polyneuropathy, Organomegaly, Endocrinopathy, M protein, and Skin abnormalities. Other features include papilledema, extravascular volume overload, sclerotic bone lesions, thrombocytosis, and Castleman disease. It is a multisystemc disorder with a good long-term prognosis.