The technique of advancement flap haemorrhoidectomy.

Surgery is still the mainstay of treatment for large, prolapsing haemorrhoids. The teaching of Sir Alan Parks, and more recently the work of W.H.F. Thompson, have shown that degeneration of the supportive tissue of the anal canal and the subsequent sliding of the anal lining, was the greatest contributing factor in the development of haemorrhoids. The method of treatment described follows Sir Alan Park's principles of conservation of the anal canal mucosa and skin. This is then used to reline the anal canal after careful dissection and excision of the external and internal haemorrhoids. It therefore returns this prolapsed, sensitive epithelium to its original site. Wound healing is rapid and anal stenosis is avoided.