Our objective was to assess if contrast-enhanced (CE) anal endosonography (AES) with @entity273 is useful in the diagnosis of @entity12478 . A Bruel and Kjaer scanner with a 7.0-MHz transducer was used. After visualization of the fistula tract in non-contrast (NC) AES, @entity273 was introduced into the fistula tract through the external opening in 22 @entity1 with different types of @entity9292 . Both CE and NC AES revealed 13 transsphincteric, 3 intersphincteric, 2 suprasphincteric and 4 ano-vaginal @entity292 . Simple tracts were found in 16 cases and complex in 6 cases in non-contrast AES. The CE AES revealed 19 simple and 3 complex @entity292 . Fifteen internal openings visible in NC AES were confirmed in CE AES in 6 cases, which additionally found 11 more internal openings. Surgery confirmed all types of @entity292 found in NC and CE AES; however, the latter two found 18 simple and 4 complex @entity292 , and 21 internal openings. Both NC and CE AES are able to correctly differentiate types of @entity9292 and are of comparable value in differentiating simple from complex @entity292 , although a false-negative result was found in CE AES. In the preoperative assessment of the internal opening, CE AES is superior to NC AES.

Usefulness of @entity273 enhancement in diagnosis of XXXX .

@entity1 :: ('9606', 'Species') :: ['patients'] @entity12478 :: ('MESH:D014624', 'Disease') :: ['anal and ano-vaginal fistulas'] @entity273 :: ('MESH:D006861', 'Chemical') :: ['hydrogen peroxide'] @entity9292 :: ('MESH:D012003', 'Disease') :: ['anal fistulas'] @entity292 :: ('MESH:D005402', 'Disease') :: ['fistulas']
@entity12478 :: (MESH:D014624,Disease) :: ['anal and ano-vaginal fistulas']
