Table 1 Diagnostic accuracy of 28 cases of anal fistulas using endoanal ultrasound
From: Clinical value of endoluminal ultrasonography in the diagnosis of rectovaginal fistula
Confirmed morphology | Endosonography finding | Surgical finding | Positive predicative value | Sensitivity |
|---|---|---|---|---|
Simple fistula | 6 | 6 | 100 % | 100 % |
Complex fistula | 20 | 22 | 90 % | 90 % |
Opening to vaginal wall | 30 | 30 | 93 % | 93 % |
Opening to anal canal or rectum | 28 | 28 | 100 % | 100 % |
Abscess | 5 | 5 | 100 % | 100 % |
Anal fistula | 12 | 14 | 92.3 % | 92.3 % |
Rectovaginal fistula | 16 | 14 | 93 % | 93 % |
Sphincter defect | 2 | 2 | 100 % | 100 % |