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Heparin-like anticoagulant associated with multiple myeloma and neutralized with protamine sulfate. 2007

Lamia Torjemane, and Sami Guermazi, and Saloua Ladeb, and Neila Ben Romdhane, and Amel Lakhal, and Abderrahman Abdelkefi, and Tarek Ben Othman, and Abdeladhim Ben Abdelhadhim
Centre National de Greffe de Moelle Osseuse de Tunis, Tunis, Tunisia. lamia_torjemane@yahoo.fr

A 55-year-old man with multiple myeloma developed sustained bleeding after bone marrow aspiration and cutaneous bleeding. Routine coagulation studies revealed a prolonged activated partial thromboplastin time and thrombin time (> 60 s) with a normal reptilase time. Further evaluation showed failure of the activated partial thromboplastin time to correct completely in a 1: 1 mixture with normal plasma. Treatment of the patient's plasma in vitro with protamine sulfate normalized the thrombin time. The presence of a heparin-like anticoagulant was suspected. The plasma heparin level was 0.73 IU/ml. Intravenous infusion of protamine sulfate appeared to neutralize the anticoagulant activity and stop the bleeding. The cancer cells themselves or the invasive nature of this type of cancer might result in a massive release of a heparinoid. Such coagulopathy appears to be a rare mechanism of bleeding and it is an important entity to consider since it is potentially reversible with protamine sulfate.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009101 Multiple Myeloma A malignancy of mature PLASMA CELLS engaging in monoclonal immunoglobulin production. It is characterized by hyperglobulinemia, excess Bence-Jones proteins (free monoclonal IMMUNOGLOBULIN LIGHT CHAINS) in the urine, skeletal destruction, bone pain, and fractures. Other features include ANEMIA; HYPERCALCEMIA; and RENAL INSUFFICIENCY. Myeloma, Plasma-Cell,Kahler Disease,Myeloma, Multiple,Myeloma-Multiple,Myelomatosis,Plasma Cell Myeloma,Cell Myeloma, Plasma,Cell Myelomas, Plasma,Disease, Kahler,Multiple Myelomas,Myeloma Multiple,Myeloma, Plasma Cell,Myeloma-Multiples,Myelomas, Multiple,Myelomas, Plasma Cell,Myelomas, Plasma-Cell,Myelomatoses,Plasma Cell Myelomas,Plasma-Cell Myeloma,Plasma-Cell Myelomas
D011479 Protamines A group of simple proteins that yield basic amino acids on hydrolysis and that occur combined with nucleic acid in the sperm of fish. Protamines contain very few kinds of amino acids. Protamine sulfate combines with heparin to form a stable inactive complex; it is used to neutralize the anticoagulant action of heparin in the treatment of heparin overdose. (From Merck Index, 11th ed; Martindale, The Extra Pharmacopoeia, 30th ed, p692) Protamine,Protamine Sulfate,Protamine Chloride,Chloride, Protamine,Sulfate, Protamine
D001780 Blood Coagulation Tests Laboratory tests for evaluating the individual's clotting mechanism. Coagulation Tests, Blood,Tests, Blood Coagulation,Blood Coagulation Test,Coagulation Test, Blood,Test, Blood Coagulation
D006470 Hemorrhage Bleeding or escape of blood from a vessel. Bleeding,Hemorrhages
D006493 Heparin A highly acidic mucopolysaccharide formed of equal parts of sulfated D-glucosamine and D-glucuronic acid with sulfaminic bridges. The molecular weight ranges from six to twenty thousand. Heparin occurs in and is obtained from liver, lung, mast cells, etc., of vertebrates. Its function is unknown, but it is used to prevent blood clotting in vivo and vitro, in the form of many different salts. Heparinic Acid,alpha-Heparin,Heparin Sodium,Liquaemin,Sodium Heparin,Unfractionated Heparin,Heparin, Sodium,Heparin, Unfractionated,alpha Heparin
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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