103 High rates of venous and arterial thrombotic events in POEMS patients

Background Arterial and venous thrombotic events occur in patients with POEMS (Polyneuropathy, Organomegaly, Endocrinopathy, M-protein, Skin changes) syndrome with a previously reported rate of 20%. We reviewed the UK POEMS Registry to describe the rate of venous thromboembolism (VTE), arterial events and risk factors. Methods The UK POEMS Registry is the largest single-centre cohort in Europe and comprises 100 patients. Data were collected on arterial and venous thrombotic events from 1999 to present day. Results Of the 83 assessable patients, median age at presentation was 52 years. Twenty-five patients expe- rienced 35 clinically apparent arterial or venous events. Eleven patients had 14 VTEs including deep vein thrombosis (DVT, 4/14), pulmonary embolism (4/14) and peripherally inserted central catheter-associated DVT occurring during autologous stem cell transplant (4/14). Sixteen patients experienced 21 arterial events: stroke (7/21), peripheral arterial occlusion (6/21), myocardial infarction (4/21) and microvascular disease (2/21), with no discernible relationship with thrombocytosis or polycythaemia. The combined venous and arterial event rate was 42%, over double that previously reported. There were more arterial than venous events, and most occurred during active pre-treated disease indicating a need for a pre- emptive approach to thromboprophylaxis. Conclusion Arterial and venous thromboses are more common in POEMS syndrome than previously reported and appear associated with disease pathology and activity. We propose a management strategy for appropriate thromboprophylaxis in POEMS patients throughout the course of disease. stephen.keddie@nhs.net