Special Sono-Case: A structured sonographic assessment of a suspected perianal fistula, emphasizing tract mapping and recognition of complications.

Why this case matters

Perianal fistulas can branch, recur, and form abscesses. Ultrasound can provide useful superficial mapping when performed with appropriate technique and awareness of MRI and surgical correlation.

The case covers

• Patient preparation and sensitive positioning
• Internal and external opening assessment
• Primary tract, branches, collections, and Doppler activity
• Limitations, reporting language, and ARDMS-style questions

Educational material only. This fictional, deidentified case does not replace local protocol, radiologist interpretation, or individualized medical care.

Dr. Godefroy A. Watchiba, MD, RDMS, RVT