Dictionary » H » Haemorrhoid

Haemorrhoid

Definition

noun, plural: haemorrhoids

(1) A type of portacaval anastomoses which forms between the superior rectal vein (of portal circulation) and the middle rectal veins and inferior rectal veins (of systemic circulation).

(2) A tumor, varix, or a venous swelling at or inside the anal sphincter.


Supplement

They arise mainly due to portal hypertension. Constipation and diarrhea can lead to hemorrhoids when there is a heightened strain during bowel movements.


Word origin: Latin haemorrhoidae; from Greek haemo, 'blood', rhein, 'flow'

Variant: hemorrhoid

Mentioned in:


Please contribute to this project, if you have more information about this term feel free to edit this page



This page was last modified 09:05, 16 March 2010. This page has been accessed 1,673 times. 
What links here | Related changes | Permanent link