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| − | ==Introduction==
| + | [[Intestinal Neoplasia]] |
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| − | * Tumours may develop from any of the components of the intestinal wall.
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| − | ** May be of either a benign or malignant variation.
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| − | * Tumours have a wide range of effects on intestinal funtion.
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| − | *# Many malignant tumours cause intestinal obstruction at their point of origin.
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| − | *#* E.g. intestinal adenocarcinomas, solitary lymphomas.
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| − | *#* Onset is often gradual (unlike most foreign bodies)
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| − | *#* Benign tumours can also cause obstruction, but this is most likely if they
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| − | *#** Protrude into the lumen
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| − | *#** Are located at a compressible site, e.g. within the pelvis, at the duodenal flexure.
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| − | *# Tumours that diffusely infiltrate the mucosa cause diahorrea due to malabsorption and development of a protein losing enteropathy.
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| − | *#* E.g. diffuse alimentary lymphoma.
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| − | *# Benign or malignant tumours can result in mucosal erosion or ulceration.
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| − | *#* Blood is lost, causing haemorrhagic anaemia.
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| − | *#** Prolonged bleeding can cause iron deficiency anaemia.
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| − | *#* Extensive tumour necrosis may occur due to rapid growth or secondary infection.
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| − | *#** This can cause gradual or sudden perforation and peritonitis.
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