HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Full Text (PDF) Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Taylor, S. A. Articles by Bartram, C. I. Search for Related Content PubMed PubMed Citation Articles by Taylor, S. A. Articles by Bartram, C. I.

Pilonidal Sinus Disease: MR Imaging Distinction from Fistula in Ano¹

¹ From the Intestinal Imaging Centre, Level 4V, St Mark’s Hospital, Watford Rd, Northwick Park, Harrow, Middlesex HA1 3UJ, England. Received October 30, 2001; revision requested January 18, 2002; final revision received June 13; accepted July 3. Address correspondence to S.H. (e-mail: s.halligan@ic.ac.uk).

View larger version (157K): [in a new window]   Figure 1. Sagittal T2-weighted MR image (4,563/150, 350-mm field of view, 256 x 256 matrix, 6-mm section thickness, 0.6-mm intersection gap) in a patient with pilonidal disease shows a subcutaneous sinus (arrow) to the right of the midline at the level of the coccyx. P = posterior.

View larger version (132K): [in a new window]   Figure 2. Transverse STIR MR image (1,500/15, 375-mm field of view, 256 x 256 matrix, 4-mm section thickness, 1-mm intersection gap, four signals acquired) in a patient with pilonidal sinus disease shows subcutaneous perianal sepsis (arrow).

View larger version (140K): [in a new window]   Figure 3. Transverse STIR MR image (1,500/15, 375-mm field of view, 256 x 256 matrix, 4-mm section thickness, 1-mm intersection gap, four signals acquired) in a patient with pilonidal disease shows the sinus tract (straight arrow) reaching the lateral margin of the external anal sphincter muscle (curved arrow).

View larger version (159K): [in a new window]   Figure 4. Sagittal T2-weighted MR image (4,563/150, 350-mm field of view, 256 x 256 matrix, 6-mm section thickness, 0.6-mm intersection gap) in a patient with pilonidal disease shows the sinus tract (straight arrow) coursing posterior to the coccyx (arrowhead) and penetrating the posterior aspect of the levator muscle to reach the supralevator space (curved arrow).

View larger version (147K): [in a new window]   Figure 5. Transverse STIR MR image (1,500/15, 375-mm field of view, 256 x 256 matrix, 4-mm section thickness, 1-mm intersection gap, four signals acquired) in a patient with pilonidal sinus mistakenly classified as fistula in ano shows that the tract (straight arrow) apparently crosses the muscles of the external anal sphincter (curved arrow). L = left.

View larger version (150K): [in a new window]   Figure 6. Transverse STIR MR image (1,500/15, 375-mm field of view, 256 x 256 matrix, 4-mm section thickness, 1-mm intersection gap, four signals acquired) in a patient with fistula in ano shows an ischioanal collection (straight arrow) and a tract crossing the external anal sphincter to reach the intersphincteric plane and a posterior anal canal opening (curved arrow).