HGF and plasma cell myeloma: Of interest, Ewing Sarcoma cells that have elevated levels of Δ133p53 were shown to induce hepatocyte growth factor (HGF) secretion, resulting in tumour growth and metastasis (Charan et al, 2020) and cooperation between HGF and IL‐6 resulted in proliferation and migration of myeloma cells (Hov et al, 2009).