Endorectal ultrasonographic staging of rectal carcinoma.
Endorectal ultrasonography is a valuable imaging method for examination of the rectum and perirectal tissues. We assessed 50 patients with known rectal carcinoma prospectively by using a 7.0-MHz endorectal transducer to determine the depth of invasion of the rectal wall by tumor and the presence of lymphadenopathy. Tumors were staged by using the Astler-Coller modification of the Dukes staging system, and the results were compared with histologic staging of the surgical specimen. Ultrasonography had an accuracy of 80%, a sensitivity of 92%, and a specificity of 76% for detection of invasion of the perirectal fat. Ultrasonography was sensitive in the detection of perirectal lymphadenopathy but was not specific in distinguishing benign from malignant nodes.
Jochem
R J
RJ
Department of Diagnostic Radiology, Mayo Clinic, Rochester, MN 55905.
Reading
C C
CC
Dozois
R R
RR
Carpenter
H A
HA
Wolff
B G
BG
Charboneau
J W
JW
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D006801:Humans; D008722:Methods; D008875:Middle Aged; D009367:Neoplasm Staging; D011237:Predictive Value of Tests; D011446:Prospective Studies; D012004:Rectal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D012680:Sensitivity and Specificity; D014463:Ultrasonography