Shuohui Yang MD, Presenter: Nothing to Disclose

Fang Lu MD, Abstract Co-Author: Nothing to Disclose

Songhua Zhan MD, Abstract Co-Author: Nothing to Disclose

Wenli Tan MD, Abstract Co-Author: Nothing to Disclose

Qiong Zhu MD, Abstract Co-Author: Nothing to Disclose

To investigate the value of using balloon rectal double channel catheter (BRDCC) for the diagnosis of perianal fistula patients in conventional MRI studies.

18 perianal fistula patients with BRDCC and 18 patients without BRDCC underwent MR scans with a body coil. The number of fistulas, the internal openings, extensions and abscesses were counted. All MR findings were utilized to evaluate for the classification of the fistulas and compared with the surgery results.

On MR imaging examinations, 20 fistulas, 21 internal openings, 10 extensions and 9 abscesses were observed of 18 patients with BRDCC. There were 8 intersphincteric, 9 transsphincteric and 1 suprasphincteric fistula for the Park’s Classification. The MR findings of preianal fistula patients accorded with the operation results about location and classification. Complete agreement between MRI and surgery for fistula (20/21), interning openings(21/22）, extensions（10/10）and abscesses(9/9) were 95.24%、95.45%、100% and 100%. For another 18 patients without BRDBCC, there were 26 fistulas, 21 internal openings, 15 extensions and 6 abscesses observed. There were 6 intersphincteric, 10 transsphincteric, 1 extraphincteric and 1 suprasphincteric fistulas for the Park’s Classification. Complete agreement between MRI and surgery for fistula (26/28),interning openings(21/27）,extensions（15/16）and abscesses(6/6) were 92.86%,77.78%,93.75% and 100%. It revealed significant differences of the high-low location of fistulas between with and without BRDCC（χ2=15.9, P= 0.033）patients.

By using BRDCC, conventional MRI can provide more information of the fistulas and their routes.

Providing evidences of internal openings,extensions and abscesses of the anal fistula diagnosis and directing the operation of anal fistula

Yang, S, Lu, F, Zhan, S, Tan, W, Zhu, Q, MR Imaging of Perianal Fistulas: Value of Using a Balloon Rectal Double Channel Catheter.  Radiological Society of North America 2013 Scientific Assembly and Annual Meeting, December 1 - December 6, 2013 ,Chicago IL. http://archive.rsna.org/2013/13026754.html