Internal haemorrhoids

Haemorrhoids or piles are common and tend to develop between the ages of 20 and 50. About one out of two Westerners suffers from them by the time 50 is reached. 3 Internal haemorrhoids are a complex of dilated arteries, branches of the superior haemorrhoidal artery and veins of the internal haemorrhoidal venous plexus Fig 32.2 . The commonest cause is chronic constipation related to a lack of dietary fibre.

IsL-tfegree internal liaemorriiold

IsL-tfegree internal liaemorriiold

perianal haeimatnima Fig. 32.2 Classification of haemorrhoids ind-degree Internal l^aemcrr hold jrfi-degree {proiapsed} mteinal naemofrl^osti perianal haeimatnima Fig. 32.2 Classification of haemorrhoids

Anatomically there are three classical sites, namely 3, 7 and 11 o'clock Fig 32.3 .

Fig. 32.3 Three sites of primary haemorrhoids, looking into the anus from below

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