Indian Journal of Radiology Indian Journal of Radiology  

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ABDOMINAL IMAGING Table of Contents   
Year : 2002  |  Volume : 12  |  Issue : 3  |  Page : 343-346
Comparative study of fistulography and anal endosonography in fistula-in-ano


Dept of Radiodiagnosis, Jawaharlal Institute of Postgraduate Medical Education and Research, Pondicherry 605 006, India

Correspondence Address:
S Elangovan
Dept of Radiodiagnosis, Jawaharlal Institute of Postgraduate Medical Education and Research, Pondicherry 605 006
India
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Source of Support: None, Conflict of Interest: None


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Objectives: To prospectively evaluate the accuracy of anal endosonography in the preoperative evaluation of fistula-in-ano and to compare its efficacy with that of fistulography. Materials and Methods: Fifty patients with a clinical diagnosis of fistula-in-ano were evaluated by fistulography followed by anal endosonography. The results were correlated with findings at surgery. Results: The sensitivity of fistulography in detecting the primary track, secondary extension, internal opening and abscess cavity were 100 per cent, 66.6 per cent, 50 per cent and 30.76 per cent respectively as compared to anal endosonography findings of 98 percent, 100 per cent, 72.72 per cent and 46.15 percent. Moreover, the accurate anatomic relationships of the fistulous track in relation to the sphincteric muscles can be detected by anal endosonography, but it is not possible with fistulography. The combined use of fistulography and anal endosonography improved the sensitivity in detecting the internal opening and abscess cavity if present. Conclusions: Fistulography and anal endosonography are useful adjuncts to clinical examination in preoperative assessment of a fistula-in-ano. They give an added advantage from the surgical point of view. The injection of hydrogen peroxide into the fistulous track during anal endosonography improves its accuracy.


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