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Ⅰ.はじめに
静脈洞血栓の原因としては,感染症,妊娠,経口避妊薬,腫瘍による圧迫,ベーチェット病,cryogloblinemiaやcryofibrinogenemiaなどの血液疾患,抗リン脂質抗体症候群,家族性ATⅢ欠損症,プロテインC欠乏症やプロテインS欠乏症などの凝固系異常,潰瘍性大腸炎やクローン病などの炎症性疾患などが挙げられるが,クローン病に合併した症例は稀である.われわれは,クローン病に合併した上矢状静脈洞血栓症の症例を経験したので,その合併機序などを考察し報告する.
A 32-years-old man with a past history of hemorrhoids presenting with hemiparesis was diagnosed as having sagittal sinus thrombosis with hemorrhagic infarction. Laboratory data revealed macrocytic anemia (Hb 11.2 g/dl) with hypoproteinemia (5.5 g/dl). After discharge the patient developed abdominal pain, diarrhea, edema in the leg and sustained anemia. Final diagnosis through colon fiberscope findings was Crohn's disease Macrocytic anemia seemed to be induced by Vit. B12 deficiency due to malabsorption. The mechanism and causal relationship between Crohn's disease and sinus thrombosis is discussed.
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