What is the role of MRI, abdominal ultrasonography (US), and PET scanning in the diagnosis of pediatric Crohn disease?

Updated: Oct 23, 2018
  • Author: Andrew B Grossman, MD; Chief Editor: Carmen Cuffari, MD  more...
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Answer

MRI is especially useful in the evaluation of pelvic and perianal disease (see the images below). Abdominal ultrasonography (US) can be used to investigate intestinal disease and to rule out gallbladder and kidney stones. Positron emission tomography (PET) is an experimental diagnostic tool.

Inflamed terminal ileum in 10-year-old girl with C Inflamed terminal ileum in 10-year-old girl with Crohn disease.
Small abscess on right side of anal sphincter in 9 Small abscess on right side of anal sphincter in 9-year-old boy with Crohn disease.

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