Two Cases of Low Intersphincteric Anal Fistulas with Intrafistulous Calculi
Yoshiyuki Suzuki1, Kosuke Okamoto1, Joji Kuromizu1
1Department of Proctology, Matsushima Hospital, Yokohama, Japan.
Journal of the Anus, Rectum and Colon
|November 3, 2025
Summary
Anal fistulas with intrafistulous calculi are rare. This study reports two cases, detailing diagnosis via endoanal ultrasonography and surgical treatment, while exploring potential causes and significance.
Area of Science:
- Gastroenterology and Surgical Science
- Colorectal Surgery
Background:
- Anal fistulas are common anorectal conditions.
- Intrafistulous calculi (enterolithiasis within anal fistulas) are exceptionally rare and poorly understood.
- Enterolithiasis typically results from precipitation and calcification of indigestible materials.
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