Jean-Jacques Kiladjian, MD, PhD, Saint-Louis Hospital & Paris Diderot University, Paris, France, discusses molecular profiling and risk classification of patients with myeloproliferative neoplasms (MPNs) and splanchnic vein thromboses, a rare complication of disease. This interview was recorded via an online conference call with The Video Journal of Hematological Oncology (VJHemOnc).