IL6 and Castleman-Kojima disease: Elevated IL-6, sIL-2R, VEGF, IgA, IgE, LDH and/or B2MDisorders that have been associated with iMCD:Paraneoplastic pemphigusBronchiolitis obliterans organizing pneumoniaAutoimmune cytopeniasPolyneuropathy (without diagnosing POEMS)Glomerular nephropathyInflammatory myofibroblastic tumourReticulin fibrosis of bone marrow (particularly in patients with TAFRO syndrome)