Abstract
With the increasing use of transrectal sonography, accurate preoperatives staging of rectal cancer requires correct identification of the normal ultrasonographic appearances of the colon and rectum. Fifteen rectal and colonic specimens have been studiedin vitro to define the normal anatomy. Five distinct ultrasonic layers have been identified; a first echogenic layer that corresponds to the mucosa, a second echopoor layer made up of mucosa and muscularis mucosae, a third echogenic laver that is submucosa, a fourth echopoor layer that is muscularis propria, and a fifth echogenic layer made up of serosa and perirectal fat.
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Beynon, J., Foy, D.M.A., Temple, L.N. et al. The endosonic appearances of normal colon and rectum. Dis Colon Rectum 29, 810–813 (1986). https://doi.org/10.1007/BF02555351
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DOI: https://doi.org/10.1007/BF02555351