Plasma cell leukemia and extramedullary disease in multiple myeloma

What is the current treatment landscape for plasma cell leukemia and extramedullary disease in multiple myeloma (MM)? We spoke to Niels van de Donk, MD, PhD, of VU University Medical Center, Amsterdam, Netherlands, about this at the European School of Haematology (ESH) International Conference on MM 2018, held in Mandelieu, France.