Amna Javed Moin, Shabbir Ahmed.
Comparison of stapled v/s open haemorrhoidectomy in the management of 3 and 4 degree haemorrhoids.
Ann King Edward Med Uni Jan ;18(3):276-8.

Haemorrhoids are cushions of tissues within the anal canal containing blood vessels and their surrounding supporting tissue made up of muscles and elastic fibe-rs. Haemorrhoids result from disruption of suspensory ligaments permitting downward prolapse of the cush-ions into and beyond the anal canal during defecation. Anatomically haemorrhoid is a fold of mucous memb-rane and submucosa containing a varicosed tributary of superior rectal vein and artery, the tributaries of which lie in anal columns at 3, 7, 11 O’clock position when the patient is viewed in the lithotomy position.

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