MRI of the anal canal: Correlation with histologic examination

Beers, Bernard E. Van; Kartheuser, Alex; Delos, M.A; Grandin, Cécile; Detry, Roger; Jamart, J; Pringot, J

doi:10.1016/0730-725x(95)02056-y

Cited by 14 publications

(4 citation statements)

References 16 publications

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“…The high-resolution technique provides detailed visualization of the different muscles of the sphincter complex. In many aspects, the anatomy correlates with the anatomy presented with endoanal MRI [17][18][19][20][21] and with the in vitro MR findings of dissected anal canals [22]. Different from the endoanal anatomy is the visualization of the anal sphincter in the undisturbed resting state, which is reflected in the higher measured thickness of the internal sphincter as compared with measurements with endoluminal techniques [15].…”

Section: Discussionmentioning

confidence: 99%

High-resolution magnetic resonance imaging of the anorectal region without an endocoil

et al. 1999

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Section: Discussionmentioning

confidence: 99%

High-resolution magnetic resonance imaging of the anorectal region without an endocoil

et al. 1999

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“…[3][4][5]. Another problem with AES is that interface reflections are generated at the tissue boundaries.…”

Section: Discussionmentioning

confidence: 99%

Endosonographic Anatomy of the Normal Anal Canal Compared with Endocoil Magnetic Resonance Imaging

Williams¹,

Bartram²,

Halligan³

et al. 2002

Diseases of the Colon &Amp; Rectum

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“…Therefore, in the smooth anal cavity, no wrinkled, hypertrophic mucosa can be seen on the T2-weighted image. The lack of mucus-secreting epithelium below the level of the dentate line, shown by periodic acid-Schiff stain, so the mucosal structure cannot be seen on T2WI [ 23 ]. The dentate line was the transition zone from the glandular mucosa to the squamous epithelium [ 4 ].…”

Section: Discussionmentioning

confidence: 99%

Accuracy of magnetic resonance imaging in defining dentate line in anal fistula

et al. 2022

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Purpose To retrospectively assess the accuracy of magnetic resonance imaging (MRI) in defining dentate line in anal fistula. Materials and methods Seventy patients with anal fistulas were assessed by dynamic contrast-enhanced MRI. The distance from the dentate line to the anal verge for all patients was measured by MRI. To mitigate interference, 35 patients with anal fistulas whose internal openings were located on the dentate line were excluded from this study. Two observers independently judged the positional relationship between the internal opening and the MRI-defined dentate line, and compared with the results observed by surgeon to assess the accuracy. Results The distance between the MRI-defined dentate line and the anal verge depended on the location of the internal opening and the morphology of the anal canal mucosa. The distance based on the location the internal opening and the morphology of the anal canal mucosa was 18.2 ± 8.1 mm and 20.0 ± 5.3 mm on oblique coronal T2WI, respectively. Compared with the results observed by the surgeon, the accuracy of evaluating the positional relationship between the internal opening and the dentate line from the morphology of the anal canal mucosa on MRI exceeded 89.9%. Taking 18.2–20.0 mm as the distance between the dentate line and the anal verge on the MRI image, the accuracy of evaluating the relationship between the position of the internal opening and the dentate line was over 85.7%. Considering both the dentate line and the anal canal mucosa, the accuracy of evaluating the relationship between the internal opening and the dentate line was over 91.5%. The results of MRI-defined dentate line were in good agreement with the results of intraoperative surgeon evaluation, and the κ values were 0.70, 0.63, and 0.78, respectively. Conclusion MRI has high accuracy in defining the dentate line in anal fistulas.

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MRI of the anal canal: Correlation with histologic examination

Cited by 14 publications

References 16 publications

High-resolution magnetic resonance imaging of the anorectal region without an endocoil

High-resolution magnetic resonance imaging of the anorectal region without an endocoil

Endosonographic Anatomy of the Normal Anal Canal Compared with Endocoil Magnetic Resonance Imaging

Accuracy of magnetic resonance imaging in defining dentate line in anal fistula

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