Pediatric Fistula-in-Ano Workup

Updated: Aug 27, 2021
  • Author: Jayant Deodhar, MD; Chief Editor: Harsh Grewal, MD, FACS, FAAP  more...
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Laboratory Studies

In cases of acquired fistula-in-ano due to infection, culture and sensitivity testing are indicated to identify the causative organisms.


Imaging Studies

Imageing studies that may be helpful include the following:

  • Endorectal ultrasonography (ERUS) and magnetic resonance imaging (MRI) [11] for mapping of complex fistulae; fistulography
  • Hydrogen peroxide–enhanced ultrasonography
  • Transperineal ultrasonography with a color Doppler study to visualize a perianal fistula or abscess and to evaluate its inflammatory activity in children with Crohn disease [12]