title: Malignant rectal polyp overlooked on CT colonography because of retention balloon: opposing crescent appearance as sign of compressed polyp.
authors.affiliation: Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, 388-1 Poongnap-Dong, Songpa-Gu, 138-040 Seoul, Korea.
authors.forename: Eugene K
authors.initials: EK
authors.lastname: Choi
authors.forename: Seong Ho
authors.initials: SH
authors.lastname: Park
authors.forename: Dae Yoon
authors.initials: DY
authors.lastname: Kim
authors.forename: Hyun Kwon
authors.initials: HK
authors.lastname: Ha
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging*; D016477:Artifacts; D002404:Catheterization / Q000379:methods*; D023881:Colonography, Computed Tomographic / Q000379:methods*; D003951:Diagnostic Errors / Q000517:prevention & control*; D005189:False Positive Reactions; D006801:Humans; D007417:Intestinal Polyps / Q000150:complications / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D011856:Radiographic Image Enhancement / Q000379:methods*; D012004:Rectal Neoplasms / Q000150:complications / Q000000981:diagnostic imaging*