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[Kohlrausch's plica (plica transversalis recti): localization, morphology, function]

V Piloni1, A Montesi

  • 1Istituto Geriatrico INRCA - Servizio di Radiologia, Ancona.

La Radiologia Medica
|December 1, 1994
PubMed
Summary
This summary is machine-generated.

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The plica transversalis recti, also known as Houston's valve, most commonly appears as a double fold and is absent in 16% of individuals. Its detection and appearance vary significantly based on imaging techniques used.

Area of Science:

  • Anatomy
  • Radiology
  • Gastroenterology

Background:

  • The plica transversalis recti (Kohlrausch's plica or Houston's valve) is an anatomical landmark in the rectum.
  • Understanding its variations and radiographic appearance is crucial for accurate diagnosis.

Purpose of the Study:

  • To investigate the prevalence, localization, and radiographic features of the plica transversalis recti.
  • To assess the influence of different imaging modalities on its detection rate and characteristics.

Main Methods:

  • Analysis of radiographic data from barium enema, defecography, and coronal CT scans.
  • Evaluation of the plica transversalis recti's localization (double vs. triple folds) and absence rates.
  • Correlation of imaging findings with anatomical variations.

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Main Results:

  • The plica transversalis recti most frequently presents as a double fold (52%), with a triple fold pattern in 38% of cases, and is absent in 16%.
  • Detection rates and features varied by modality: barium enema (92%), defecography (67%), and coronal CT (90%).
  • Radiographic appearance was not affected by organic or functional anorectal conditions.

Conclusions:

  • The plica transversalis recti exhibits common variations in folding and presence.
  • Imaging technique significantly impacts the detection and visualization of this rectal fold.
  • The plica transversalis recti likely functions to stabilize rectal margins during defecation.