MR imaging of anorectal Crohn disease: a pictorial essay.

O'Donovan, Andrew Neil; Somers, Sat; Farrow, Richard; Mernagh, John R.; Sridhar, Subbamariah

doi:10.1148/radiographics.17.1.9017802

Cited by 42 publications

(26 citation statements)

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“…We chose to usedifferentsequences for the two coilsin an attempt to maximize the information avail able from each, in accordance with published data. We used a STIR protocol for body coil imaging, rather than a fat-suppressed T2-weightedprotocol,becausewe found that it provides better anatomic detail for classifica tion, in agreementwith other investigators [21]. In contrast,in most published work relat ing to endoanalfistula imaging, a 12-weighted protocol was used [17,18] becauseit provides the best balance between highlighting sepsis and supplying adequate anatomic detail for classification.…”

Section: Mr Imaging Of Fistula In Anosupporting

confidence: 58%

“…Coronal imagingidentifiesthe exact level of the internal opening and defines levator plate level, facilitating diagnosis of supra-and infra levator sepsis. Sepsis can be highlighted by STIR sequences [20], T2-weighted sequences using a frequency-specific spectral presatura tion techniquefor fat suppression [15,21], or dynamic contrast enhancement [22]. We chose to usedifferentsequences for the two coilsin an attempt to maximize the information avail able from each, in accordance with published data.…”

Section: Mr Imaging Of Fistula In Anomentioning

confidence: 99%

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MR imaging of fistula in ano: are endoanal coils the gold standard?

Halligan¹,

Bartram²

1998

American Journal of Roentgenology

104

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OBJECTIVE. It hasbeen suggested that fistulain ano is mostaccuratelyassessed using endoanalreceivercoils becausethey providesuperiorspatialresolution.We aimed to deter mine their advantageby prospective comparisonwith conventional bodycoil imaging. SUBJECTS AND METHODS. Thirty consecutive unselectedpatientswith a diagnosis of anorectal sepsiswere examined by MR imaging with an endoanalcoil. Imaging with a body coil followed. Imaging was independently evaluatedby two radiologists who classified fistulas according to the coil used and then compared their findings, which were validated surgically.RESULTS. Five patientscouldnot toleratecoil insertion.In the remaining25 patients,en doanalimagingrevealedno abnormalitiesin threepatientsin whom the bodycoil imagecor rectly showed Crohn's disease, a sinus, and a transsphincteric fistula. Imaging with both coils revealedsepsisin 16patients, allowing radiologists to make correct primary track classification in 13patientson endoanal imagingcomparedwith 15patientson bodycoil imaging.Endoanal imagingrevealed10 secondaryextensionsin eight patients,but furtherextensionsin two of these patients and in a third patient were undetected.All theseextensions were seenon body coil imaging. Overall, surgical concordance was 68% for endoanal imaging compared with 96% for conventional bodycoil imaging.CONCLUSION. Due to field-of-view limitations,endoanalimagingis lessaccuratethan conventional body coil imaging for preoperative assessment of complex anal fistulas.

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Section: Mr Imaging Of Fistula In Anosupporting

confidence: 58%

Section: Mr Imaging Of Fistula In Anomentioning

confidence: 99%

MR imaging of fistula in ano: are endoanal coils the gold standard?

Halligan¹,

Bartram²

1998

American Journal of Roentgenology

104

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“…Anorectal complications develop in 36 % of all patients with CD, particularly in the 25 % with only small bowel involvement, in 67 % of patients with colonic CD and in almost all patients with rectal involvement [9]. In 36-81 % of cases, the development of anorectal disease may precede or occur simultaneously with ileo-cecal manifestation and it can be rarely identified as the only clinical manifestation of the disease [7].…”

Section: Discussionmentioning

confidence: 99%

“…Pelvic magnetic resonance imaging (MRI) is a highly accurate non-invasive modality for the diagnosis and classification of perianal fistulas [9].…”

Section: Introductionmentioning

confidence: 99%

MRI Enteroclysis and Enterography

Vernuccio

Rabita

et al. 2015

Crohn’s Disease

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“…There have been reports that describe the findings of either Crohn's [2] or cryptoglandular [3] fistulas, but other reports have described the findings without distinguishing between the two types of fistulas [4,5]. Because of the limited definition of the patient populations and lack of distinction between the two types of perianal fistulas, the results of studies from different institutions are difficult to compare.…”

mentioning

confidence: 99%