title: Transperineal ultrasound in the assessment of haemorrhoids and haemorrhoidectomy: a pilot study.
abstract: BACKGROUND
  The purpose of the study was the measurement of the anal cushion area using static transperineal ultrasound in a group of patients with symptomatic grade III and IV haemorrhoids about to undergo haemorrhoidectomy and compare them with a group of age-matched normals and the measured area following haemorrhoidectomy.
  
  
  METHODS
  Transperineal sonography was performed using a linear transducer measuring the anal cushion area by subtracting the measured luminal diameter of the undisturbed anal canal from the inner border of the internal anal sphincter. Measures were made 6 weeks following haemorrhoidectomy.
  
  
  RESULTS
  Comparisons were made between 22 normals and 36 patients with haemorrhoids (31 evaluable post-operatively). The median area of normals was 0.78 cm², that of pre-operative patients 2.25 cm² and that of post-operative cases 1.20 cm². There was a significant difference between pre- and post-operative cases with cushion areas of normal patients being significantly lower than post-operative cases. Variance of measurement in all 3 groups was negligible.
  
  
  CONCLUSIONS
  Static transperineal sonography measuring the anal cushion area is reproducible and shows marked differences between normals and patients with symptomatic haemorrhoids. There is a marked effect on measured area resultant from haemorrhoidectomy.
authors.affiliation: Department of Surgery, Tamworth Rural Referral Centre, Universities of New England and Newcastle, PO Box 2064, Tamworth, NSW 2340, Australia. azbar55@yahoo.com
authors.forename: A P
authors.initials: AP
authors.lastname: Zbar
authors.forename: R
authors.initials: R
authors.lastname: Murison
mesh_terms: D000328:Adult; D000368:Aged; D001003:Anal Canal / Q000000981:diagnostic imaging* / Q000473:pathology*; D006484:Hemorrhoids / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007413:Intestinal Mucosa / Q000000981:diagnostic imaging / Q000473:pathology; D008875:Middle Aged; D010502:Perineum; D010865:Pilot Projects; D014463:Ultrasonography
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