Anal fistula x ray

Anal fistula Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Manpreet Kaur, MD [2]

Overview

There are no x-ray findings associated with anal fistula.

X Ray

• Fistulography is used to diagnose anal fistula in the past.
• Fistulography is painful and invasive procedure so it is replaced by MRI nowadays.
• This is used to find out the anatomy of fistulas

Procedure:

• A fine cannula is catheterized through the external opening and a water-soluble contrast agent is injected to find out the fistulous track

Drawbacks of fistulography:

• It is very difficult to assess fistula with multiple tracts due to the filling defect with contrast material.
• Fistulography is not used to visualize the anal sphincter.