title: Segmental wall thickening in the colonic loop distal to colonic carcinoma at CT: importance and histopathologic correlation.
abstract: OBJECTIVE
  To determine the importance of the finding of segmental wall thickening in the colonic loop distal to colonic carcinoma at computed tomography (CT) by means of histopathologic correlation.
  
  
  METHODS
  Thirteen consecutive patients whose helical CT scans showed segmental wall thickening (>1 cm in maximal width, >5 cm in length) in the colonic loop distal to colonic carcinoma were included. The thickness and length of an involved segment, location, morphologic tumor type, CT patterns of wall thickening, and pericolic changes were evaluated. Surgical pathologic findings in all 13 patients were correlated with CT findings.
  
  
  RESULTS
  The involved segment distal to the colonic carcinoma showed circumferential wall thickening with a preserved wall layer pattern at CT. Pericolic changes of varying degrees were seen in 10 patients. Histopathologic examination revealed submucosal and subserosal edema (n = 6), chronic inflammation and fibrosis (n = 5), or both (n = 1), and no histopathologic alteration (n = 1). The tumors were mostly fungating (n = 11), larger than 5 cm in the greatest dimension (n = 12), located in the ascending colon (n = 10), and extended to pericolic adipose tissue (n = 11).
  
  
  CONCLUSIONS
  Colonic carcinoma, especially a large fungating type involving the ascending colon with pericolic infiltration, can produce segmental wall thickening in the distal segment at CT, which represents edema or colitis at histopathologic examination.
authors.affiliation: Departments of Radiology, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea.
authors.forename: H J
authors.initials: HJ
authors.lastname: Jang
authors.forename: H K
authors.initials: HK
authors.lastname: Lim
authors.forename: C K
authors.initials: CK
authors.lastname: Park
authors.forename: S H
authors.initials: SH
authors.lastname: Kim
authors.forename: J M
authors.initials: JM
authors.lastname: Park
authors.forename: Y L
authors.initials: YL
authors.lastname: Choi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003092:Colitis / Q000000981:diagnostic imaging / Q000473:pathology; D003106:Colon / Q000000981:diagnostic imaging* / Q000473:pathology; D003110:Colonic Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D004487:Edema / Q000000981:diagnostic imaging / Q000473:pathology; D005260:Female; D006801:Humans; D006984:Hypertrophy; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D014057:Tomography, X-Ray Computed