Techniques in Coloproctology

, Volume 22, Issue 4, pp 321–322 | Cite as

Videodefecography is still superior to magnetic resonance defecography in the study of obstructed defecation syndrome

  • J.-L. Faucheron
  • P.-Y. Sage
  • B. Trilling

Dear Sir,

We read with interest the article by Martín-Martín et al. [1] reporting on evaluation of the diagnostic accuracy of magnetic resonance (MR) defecography and videodefecography (VD) in obstructed defecation syndrome (ODS). Based on their experience and partial review of the literature, the authors conclude that MR defecography is the imaging modality of choice for evaluating patients with ODS. Our experience in pelvic floor imaging [2, 3] and rectal prolapse repair [4, 5, 6, 7], and the attentive reading of the methodology and results reported by the authors, showing many weaknesses and deficiencies, lead us to make some comments and criticisms on this article.

Concerning clinical biases, our first question is why 2 men were included in the study, as in men there is of course no rectocele nor cystocele or perineal descent. Therefore, the rectocele rates for VD and MR defecography are not 90 and 92.5%, but 95 and 97%, respectively. Second, there is no mention on the use of...


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Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Informed consent

For this type of study, informed consent is not required.


  1. 1.
    Martín-Martín GP, García-Armengol J, Roig-Vila JV et al (2017) Magnetic resonance defecography versus videodefecography in the study of obstructed defecation syndrome: is videodefecography still the test of choice after 50 years? Tech Coloproctol 21:795–802CrossRefPubMedGoogle Scholar
  2. 2.
    Faucheron JL, Barot S, Collomb D, Hohn N, Anglade D, Dubreuil A (2014) Dynamic cystocolpoproctography is superior to functional pelvic magnetic resonance imaging in the diagnosis of posterior pelvic floor disorders: results of a prospective study. Colorectal Dis 16:240–247CrossRefGoogle Scholar
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© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Colorectal Unit, Department of SurgeryGrenoble Alpes University HospitalGrenobleFrance
  2. 2.UMR 5525, CNRS, TIMC-IMAGUniversity Grenoble AlpesGrenobleFrance

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