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| | * Adenocarcinomas are locally aggressive and spread via the lymphatics to the [[Lymph Nodes - Anatomy & Physiology|lymph nodes]], lung, [[Liver - Anatomy & Physiology|liver]] and [[Adrenal Glands - Anatomy & Physiology|adrenal glands]]. | | * Adenocarcinomas are locally aggressive and spread via the lymphatics to the [[Lymph Nodes - Anatomy & Physiology|lymph nodes]], lung, [[Liver - Anatomy & Physiology|liver]] and [[Adrenal Glands - Anatomy & Physiology|adrenal glands]]. |
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| − | ==Intestinal== | + | ==[[Intestinal Adenocarcinoma|Intestinal Adenocarcinoma]]== |
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| − | * An '''intestinal adenocarcinoma''' is a malignancy of epithelial cells from the intestinal mucosa.
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| − | * Found in both the [[Small Intestine - Anatomy & Physiology|small]] and [[Large Intestine - Anatomy & Physiology|large intestines]]
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| − | ** Common in the canine [[Rectum - Anatomy & Physiology|rectum]].
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| − | * Species affected:
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| − | ** Fairly common in dog and cat.
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| − | ** Seen related to bracken ingestion in the older sheep.
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| − | ** Occasionally occur in horses.
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| − | * These tumours usually grow away from the mucosa, down through the muscularis mucosae and into the submucosa, muscular layers and the serosa.
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| − | ** They may, however, project into the lumen.
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| − | * Intestinal adeocarcinomas may take an annular form.
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| − | ** This may result in stenosis of lumen
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| − | *** Muscle proximal to the lesion becomes hypertrophied and dilated.
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| − | * Spread may be
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| − | *# Via the lympahtics.
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| − | *#* To the lymph nodes, lung and [[Liver - Anatomy & Physiology|liver]].
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| − | *# Transcoelomic spread
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| − | *#* Small, white plaques on serosa and adjacent tissues e.g. diaphragm.
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| | ==Tumours of the Perianal Area== | | ==Tumours of the Perianal Area== |