below dentate line
- below dentate line
- Squamous epithelium - sensate
- Haemorrhoidal disease - when the above become symptomatic
- external haemorrhoidal plexus is a venous plexus encircling the anal verge.
Portal hypertension may lead to en- gorgement of the haemorrhoidal plexus but this leads to anorectal varices not haemorrhoids.
An external thrombosed varix occurs when a blood clot develops in the external haemorrhoidal plexus