Cardiac Tamponade-A Rare Manifestation of Ruxolitinib Discontinuation Syndrome: A Case Report

A 52-year-old gentleman presenting with tachycardia was found to have a large pericardial effusion and cardiac tamponade. This case was on a background of long-standing myelofibrosis managed with ruxolitinib, which was recently withheld for an orthopaedic procedure. He was diagnosed with presumed ruxolitinib discontinuation syndrome (RDS), resulting in a large pericardial effusion due to an increased inflammatory response. He was managed with a pericardial window and prompt recommencement of ruxolitinib and steroids. This case highlights the importance and increasing prevalence of RDS with the serious consequence of cardiac tamponade. Symptoms of RDS should be recognised and managed with recommencement of a JAK inhibitor and steroids.