Hypereosinophilic Syndrome Resembling Chronic Inflammatory Bowel Disease with Primary Sclerosing Cholangitis

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Abstract
A patient who presented with chronic inflammation of the colon, and initially also the terminal ileum, accompanied by marked diarrhea, is described. Repeated high-dose steroid therapy was only temporarily successful, and symptoms recurred upon dose reduction. During the further course of the disease, a marked elevation of alkaline phosphatase and transaminases, as well as soft tissues swelling occurred. Clinically, the diagnosis of inflammatory bowel disease with primary sclerosing cholangitis was made. Irregularities in the walls of the common bile duct and the intrahepatic ducts seen at endoscopic retrograde cholangiopancreatography were consistent with the latter diagnosis. However, extreme eosinophilia of peripheral blood, bone marrow and bowel mucosa was present, and liver histology showed eosinophilic cholangiohepatitis. Under the diagnosis of hypereosinophilic syndrome with involvement of bowel, liver and biliary system, therapy with hydroxyurea was initiated. The patient's condition improved promptly. Eosinophil count and liver enzymes have remained normal under long-term medication with 1.0 g per day of this drug.

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