POEMS syndrome is a paraneoplastic syndrome characterized by polyradiculoneuropathy (P), organomegaly (O), endocrinopathy (E), clonal plasma cell disorder (M), and skin changes (S). Other features include papilledema, extravascular volume overload, sclerotic bone lesions, thrombocytosis/erythrocytosis, and elevated VEGF levels.

A type of glomerulonephritis characterized by diffuse mesangial cell proliferation and the thickening of capillary walls due to subendothelial extension of the mesangium. The term membranoproliferative glomerulonephritis is often employed to denote a general pattern of glomerular injury seen in a variety of disease processes that share a common pathogenetic mechanism, rather than to describe a single disease entity