[Prevalence and risk factors of thromboembolic complications in inflammatory bowel disease]

Patients with inflammatory bowel disease [IBD] are at increased risk of thromboembolic complications [TEC], which represent an important cause of morbidity and mortality. To assess the prevalence and risk factors of TEC in patients with IBD. We conducted a retrospective study including all the IBD patients in the gastroenterological department of Charles Nicolle hospital between 2000 and 2010. Only thromboembolic events that had been diagnosed by an imaging procedure were counted. A total of 266 patients with IBD were consecutively included. TE events occurred in nine patients [3.4%]; six men and three women. Their mean age was 31years [15-64 years]. Five patients had Crohn's disease and four had ulcerative colitis. The types of TEC were deep venous thrombosis of the leg in five cases with pulmonary embolism in one of them, cerebral venous thrombosis in two cases, portal thrombosis in one case and jugular vein thrombosis in one case. Active disease was present in all cases at the time TEC occurred. In our study, the prevalence of TEC is 3.4% in patients with IBD. Deep venous thromboses of the leg are the most common TEC and all our cases occurs during the active phase of IBD

[Dysfibrinogenemia and thrombosis. A case report]

Congenital dysfibrinogenemia is a functional disorder of the fibrinogen that represents a rare cause of thrombophilia. To report a Tunisian case of the association dysfibrinogenemia and thrombosis. A woman with ingerited dysfibrinogenemia associated with mild tendency to bleeding experienced a deep vein thrombosis of the lower-extremity at 26 years of age and a fatal pulmonary embolism a few years later. Paradoxically coagulation function of fibrinogen was markedly altered in vitro with a significally prolonged prothrombin time, activated partial thromboplastin time and thrombin time, a functional fibrinogen level that was undetected and a severely impaired fibrin polymerization. The thromboembolic events in the patient could be related to dysfibrinogenemia since the main causes of thrombophilia were excluded. Although it is rare, this cause of thrombophilia must be misdiagnosed, systematic measuring of prothrombin time, activated partial thromboplasting time and functional fibrinogen might be helpful

[Chronic dissiminated intravascular coagulation caused by aortic dissection]

Disseminated intravascular coagulation [DIC] is a severe disease. It's can be caused by lost of pathology. We report the case of chronic aortic dissection discovered during the evaluation of disseminated intravascular coagulation [DIC]. This case is characterised by the severity of clinical presentation, challenging diagnosis and difficulty of therapeutic approach. Low dose of heparine may reduce the severity of this situation; but vital prognosis remains obscure. Aortic dissection is a rare but a severe cause of disseminated intravascular coagulation

Biological diagnosis of von willebrand disease and its difficulties

Von Willebrand disease is the most common inherited bleeding disorder, with autosomal genetic transmission, dominant in most cases. It is due to quantitative and / or qualitative deficiency of Von Willebrand factor, a multimeric complex glycoprotein that plays 2 central roles in hemostasis, since it is implicated in adhesion and aggregation of platelets under conditions of high shear forces and acts as a carrier for coagulation factor VIII in plasma. Clinically, this disease is mostly characterized by mucocutaneous bleeding and marked clinical heterogeneity, even in the same family, going from severe to uncouth forms or even asymptomatic. Laboratory diagnosis is based on 3 levels of hemostasis testing. Screening tests making suspicion of the disease, must be completed by specific assays to estabilish the diagnosis. Discriminating tests allow accurate characterization of the numerous types and subtypes of the disease, a crucial step to adapt therapeutics. The classification based on the accumulating knowledge of the different phenotypes, differentiate between quantitative [types 1 and 3] and qualitative deficiencies [types 2]. Von Willebrand disease's diagnosis is not, often easy. In fact, several technical or genetic factors and different physiopathological circumstances interfere in the interpretation of explorations results and cause diagnostic difficulties that will be discussed