Kabuki syndrome, OMIM 147920 (KS) is a disorder characterized by multi-system abnormalities. These include physical, neurological, endocrine, and autoimmune abnormalities. Multiple. autoimmune abnormalities are described in KS such as immune thrombocytopenic purpura (ITP), vitiligo, thyroiditis, hemolytic aneinia, and hypogammaglo-bulinemia. in this report, we describe a patient with KS with sudden onset chorea associated with the presence of antiphospholipid antibodies (aPLs) in the serum. Chorea in the presence of aPLs has been well described in the literature both in the presence and absence of antiphospholipid syndrome (APS) and systemic lupus erythematosus (SLE). This report of APT, in a patient with KS adds to the list of autoimmune disorders seen in patients with KS and also strengthens the hypothesis that patients with this syndrome have an increased incidence of immune dysregulation. (c) 2007 Wiley-Liss, Inc.