CASE REPORTSTwo cases of acquired haemophilia A associated with chronic myelomonocytic leukaemiaUaprasert, Noppacharn; Wongrakpanich, Supakanya; Rojnuckarin, PonlapatAuthor Information aDivision of Hematology, Department of Medicine, Faculty of Medicine, Chulalongkorn University bFaculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Bangkok, Thailand Correspondence to Noppacharn Uaprasert, MD, Chulalongkorn University, Bangkok, Thailand Tel: +66 2 256 4564; fax: +66 2 253 9466; e-mail: email@example.com Received 5 January, 2013 Revised 1 March, 2013 Accepted 3 March, 2013 Blood Coagulation & Fibrinolysis: September 2013 - Volume 24 - Issue 6 - p 655-657 doi: 10.1097/MBC.0b013e328360d038 Buy Metrics Abstract Acquired haemophilia A (AHA) is an uncommon, but potentially fatal, bleeding diathesis caused by autoantibodies against circulating coagulation factor VIII (FVIII). The incidence is approximately 0.15 cases per 100 000 person-years. The underlying causes of AHA can be identified in approximately half of the patients, of which malignancies account for 10–20%. Heretofore, there has been only one case report of AHA concomitant with chronic myelomonocytic leukaemia (CMMoL), which previously was a subtype of the myelodysplastic syndrome. In this article, we report two more cases of AHA with CMMoL in our hospital and review possible causal relations between these two rare blood disorders. Copyright © 2013 YEAR Wolters Kluwer Health, Inc. All rights reserved.