Normal Anatomy of the Anal Wall and Perianal Spaces: An EUS, MRI and Cadaveric Correlative Study
Journal of the Korean Radiological Society
;
: 109-114, 1994.
Article
in Korean
| WPRIM
| ID: wpr-196674
ABSTRACT
PURPOSE:
To understand the normal endosonographic anatomy of the perianal spaces, and to evaluate the diagnostic efficacy and limitation of endorectal sonography(EUS), correlative study with MRI, cadaveric sectional image and cadaveric MRI were performed. MATERIALS ANDMETHODS:
EUS images of the normal 6 perianal spaces (pelvirectal, ischiorectal, intersphincteric, subcutaneous, central, submucous space) which were bounded by internal and external anal sphincters, rectal wall and levator ani muscle were correlated with MRI in 10 normal persons, cadaveric sectional images and cadaveric MRI in 2 cadavers.RESULTS:
Pelvirectal space located superior to levator ani muscle could be demonstrable only on anterior wall scan but could not be visualized on lateral or posterior wall scan on EUS. Five perianal spaces located inferior to levator ani muscle were well seen on anterior, lateral, and posterior wall EUS. MRI was superior to EUS in the evaluation of pelvirectal and ischiorectal spaces but equal or inferior to EUS in the evaluation of intersphincteric, subcutaneous, central and submucous spaces.CONCLUSION:
EUS was valuable in the evaluation of perianal spaces inferior to levator ani muscle but was limited in the evaluation of perianal spaces superior to levator ani muscle.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Anal Canal
/
Cadaver
/
Magnetic Resonance Imaging
Limits:
Humans
Language:
Korean
Journal:
Journal of the Korean Radiological Society
Year:
1994
Type:
Article
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