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*#** Distinguishable from a peptic ulcer as the edges of the eroded area are raised and thickened (tumour tissue).
*#** Distinguishable from a peptic ulcer as the edges of the eroded area are raised and thickened (tumour tissue).
* The external appearance of an affected [[Forestomach - Anatomy & Physiology|stomach]] can include thickening of the draining lymphoid vessels due to tumour infiltration ('cording of the lymphatics') and evidence of a scirrhous reaction to the carcinoma.
* The external appearance of an affected [[Forestomach - Anatomy & Physiology|stomach]] can include thickening of the draining lymphoid vessels due to tumour infiltration ('cording of the lymphatics') and evidence of a scirrhous reaction to the carcinoma.
* 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]].[[Category:Stomach and Abomasum - Proliferative Pathology]][[Category:Dog]][[Category:Cat]]
* 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]].
==Intestinal==
* An '''intestinal adenocarcinoma''' is a malignancy of epithelial cells from the intestinal mucosa.
* Found in both the [[Small Intestine - Anatomy & Physiology|small]] and [[Large Intestine - Anatomy & Physiology|large intestines]]
** Common in the canine [[Rectum - Anatomy & Physiology|rectum]].
* Species affected:
** Fairly common in dog and cat.
** Seen related to bracken ingestion in the older sheep.
** Occasionally occur in horses.
* These tumours usually grow away from the mucosa, down through the muscularis mucosae and into the submucosa, muscular layers and the serosa.
** They may, however, project into the lumen.
* Intestinal adeocarcinomas may take an annular form.
** This may result in stenosis of lumen
*** Muscle proximal to the lesion becomes hypertrophied and dilated.
* Spread may be
*# Via the lympahtics.
*#* To the lymph nodes, lung and [[Liver - Anatomy & Physiology|liver]].
*# Transcoelomic spread
*#* Small, white plaques on serosa and adjacent tissues e.g. diaphragm.
[[Category:Stomach and Abomasum - Proliferative Pathology]][[Category:Dog]][[Category:Cat]]
[[Category:Intestines_-_Proliferative_Pathology]]