Prospective Assessment of Accuracy of Endoanal MR Imaging and Endosonography in Patients with Fecal Incontinence
Andrew J. Malouf1,2,
Andrew B. Williams1,
Steve Halligan1,
Clive I. Bartram1,
Sukvinder Dhillon1 and
Michael A. Kamm2
1
Intestinal Imaging Centre, St. Mark's Hospital, Northwick Park, Watford Road,
Harrow, Middlesex, HA1 3UJ, United Kingdom.
2
Sir Alan Parks Physiology Unit, St. Mark's Hospital, Northwick Park, London,
HA1 3UJ, United Kingdom.

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Fig. 1A. 47-year-old woman with anal incontinence caused by functional
disorder. Anal endosonogram shows intact external (curved arrows) and
internal (straight arrow) anal sphincters. Anterior is uppermost.
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Fig. 1B. 47-year-old woman with anal incontinence caused by functional
disorder. T2-weighted endoanal MR image also shows intact external (black
arrow) and internal (white arrow) anal sphincters.
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Fig. 2A. 57-year-old woman with incontinence after anal surgery for
hemorrhoids. Anal endosonogram shows internal sphincter defect between 10-and
3-o'clock positions (arrows).
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Fig. 2B. 57-year-old woman with incontinence after anal surgery for
hemorrhoids. T2-weighted endoanal MR image shows internal sphincter to be
intact (arrow).
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Fig. 3A. 60-year-old man with incontinence after surgery for fistula in ano.
Anal endosonogram shows internal sphincter defect, with general fragmentation
of sphincter. Straight arrows indicate sphincter remnants. External sphincter
defect in right posterior quadrant was also visualized (curved
arrow).
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Fig. 3B. 60-year-old man with incontinence after surgery for fistula in ano.
T2-weighted endoanal MR image at level corresponding to A also shows
internal sphincter fragments (straight arrows). External sphincter
was shown to be intact (curved arrow).
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Copyright © 2000 by the American Roentgen Ray Society.