Wolfram-Trudo Knoefel

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Endoscopic biliary stent insertion is a well-established procedure. It is especially successful in treating postoperative biliary leaks, and may prevent surgical intervention. A routine change of endoprostheses after 3 mo is a common practice but this can be prolonged to 6 mo. We reported a colonic perforation due to biliary stent dislocation and migration(More)
Gastrointestinal stromal tumors (GIST) are the most common mesenchymal tumors of the digestive tract. Approximately two thirds of clinically manifest tumors occur in the stomach, nearly one third in the small bowel, and the rest in the colorectal region with a few cases in the esophagus. GIST originate within the smooth muscle layer in the wall of the(More)
BACKGROUND Ampullary carcinoma of the pancreas accounts for 5% of all gastrointestinal malignancies in humans. Only a very few cell lines of this carcinoma have been established. PATIENTS AND METHODS Tumor cells isolated from a surgically resected ampullary carcinoma were put into culture. The cultured cells were characterized for their biological,(More)
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