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[Acquired von Willebrand syndrome associated with Hashitoxicosis and pernicious anemia combined].

ABSTRACT A new case of acquired von Willebrand syndrome (AvWS) with Hashitoxicosis and pernicious anemia combined in a 73-years-old male is reported. He was admitted because of appetite loss and general malaise. Physical examination showed severe anemia and general edema. The red-cell count was 103 X 10(4)/microliters with a MCV of 122 fl; the white-cell count was 2,900/microliters with 24.5% hypersegmented neutrophils; the platelet count was 17.2 X 10(4)/microliters. the lactate dehydrogenase was 9,513 U/ml and vitamin B12 was 87 pg/dl. An aspirated specimen of bone marrow was diagnostic of megaloblastic anemia. The thyroid hormones were decreased with the thyroid stimulating hormone increased. From the immunological findings, the thyroid-test, microsome-test, and anti-intrinsic factor were positive, but M proteinemia and Bence Jones proteinuria were absent. Histology of the thyroid gland and the gastric mucosa established the diagnosis of chronic thyroiditis and chronic atrophic gastritis. Subcutaneous hemorrhages after veni-puncture were observed on admission. He had a normal bleeding time, but the coagulation studies indicated the presence of von Willebrand disease, but as his family and past history were negative, this suggested the presence of an AvWS. The analysis of von Willebrand factor (vWF) multimeric composition had showed the lack of the larger multimers in the plasma, but it was normalized after the administration of levothyroxine sodium and hydroxocobalamin with vWF: Ag/RCo ratio paralleled. As far as we know, this is the first report of AvWS with Hashitoxicosis and pernicious anemia combined.

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    ABSTRACT: Acquired von Willebrand's syndrome type I is the supposed main underlying cause of bleeding tendency in hypothyroid patients. The purpose of this systematic review was to summarize the published evidence on the association between hypothyroidism and acquired von Willebrand's syndrome. All published clinical epidemiological and interventional studies, case reports and in vitro studies that investigated the association between hypothyroidism and acquired von Willebrand's syndrome were identified by a computer-assisted search of the MEDLINE and EMBASE electronic databases. A quality assessment was performed for clinical epidemiological studies. A total of 41 papers were included. A total of 22 epidemiological in vivo studies, two in vitro studies and 47 case reports were finally analyzed. No high quality in vivo study was identified. Almost all bleeding episodes described in the case reports were mucocutaneous. von Willebrand factor (VWF) antigen value was available for 23 patients: median value 28 U/dL (range: 4-45); VWF activity was available for 24 patients: median value 28.5 U/dL (range: <3-55); factor VIII activity was available for 16 patients: median value 47 U/dL (range: 9-74). Acquired von Willebrand's syndrome may be the main factor responsible for bleeding diathesis in overt hypothyroid patients. Even if bleeding episodes are mainly mild and mucocutaneous, blood transfusion, drug administration or surgical procedure may be required.
    Haemophilia 06/2008; 14(3):423-33. DOI:10.1111/j.1365-2516.2007.01642.x · 2.47 Impact Factor