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Category:Intestines - Proliferative Pathology (view source)

Revision as of 19:40, 6 June 2010

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→‎Tumours of the Perianal Area

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== Intestinal stromal tumours ==

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~~==Tumours of the Perianal Area==~~

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~~===Hepatoid Gland Tumours (Perianal Adenomas)===~~

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~~[[Image:normal perianal gland.jpg|thumb|right|100px|Perianal gland- normal (Courtesy of Bristol BioMed Image Archive)]] * Affect the dog.~~

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* Arise from the solid, modified sebaceous circumanal glands.

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* Common in ageing entire males. [[Image:perianal gland adenoma histopath.jpg|thumb|100px|Perianal gland- adenoma (Courtesy of Bristol BioMed Image Archive)]]

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* Lesions range from hyperplasia to true adenomas (benign).

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** These low grade lesions are under hormonal control.

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*** Castration/ administation of oestrogens or anti-androgens causes reduction in size.[[Image:perianal gland adenoma.jpg|thumb|right|100px|Perianal adenoma- gross appearance (Courtesy of Bristol BioMed Image Archive)]]

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* Occasionally hepatoid carcinomas (malignant) arise in affected males

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** Outwith hormonal control.

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* Hepatoid gland tumours occur rarely in bitches.

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** Are commonly malignant.

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* Hepatoid glands are also found at the tail head, prepuce and occasionally other skin sites.

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** Hepatoid tumours can also arise in these areas.

===Adenocarcinomas of the Glands of the Anal Sac (Apocrine Glands)===

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