文档介绍：State of the Art
Frederick M. Kelvin, MD #{149}Dean D. T. Maglinte, MD
Colorectal Carcinoma:
A Radiologic and Clinical Review’
Index terms: Barium enema examination, tent, for Crohn disease of the colon. Based on these data, all polyps which
#{149}Colon, CT, #{149}Colon, MR stud- Women who have had breast or uter- are 1 cm or more in diameter should
ies, #{149}Colon, neoplasms, #{149}Colon,
me carcinoma, or who have received be removed endoscopically. Polyps
US studies, #{149}Endoscopy #{149}Rectum, neo-
pelvic radiation (2), are also at in- measuring between 6 and 10 mm
plasms, #{149}State-of-the-Art Reviews
creased risk, as are patients with a have an approximately 1% frequency
Radiology 1987; 164:1-8 ureterosigmoidostomy. There is a of invasive carcinoma and therefore
possible association between retinitis are also frequently removed. On his-
pigmentosa and colorectal carcinoma. tologic examination, adenomas are
It is now widely accepted that characteristically tubular (75%), vil-
C OLORECTAL carcinoma is current- most, if not all, carcinomas of the bus (10%), or tubovillous (15%). Vil-
ly the monest inter- large bowel arise from preexisting bus adenomas have the highest fre-
nal malignancy in the United States, adenomas: the adenoma-carcinoma quency (approximately 40%) of
with 145,000 new cases expec