title: CT in searching for abscess after abdominal or pelvic surgery in patients with neoplasia: do abdomen and pelvis both need to be scanned?
abstract: OBJECTIVE
  This prospective study was undertaken to determine the incremental yield of combined abdominal and pelvic CT in searching for clinically suspected postoperative abscess in oncologic patients.
  
  
  METHODS
  One hundred seventeen oncologic patients underwent CT to exclude a clinically suspected abscess within 30 days of abdominal or pelvic surgery during an 8 month period. Scans were evaluated for the presence of ascites, loculated fluid collections, or other possible sources of fever. The clinical course and any intervention in the abdomen or pelvis within 30 days after CT were recorded.
  
  
  RESULTS
  After abdominal surgery, 44 of 69 [64%; confidence interval (CI) 51-75%] patients had loculated fluid collections in the abdomen; no patient (0%; CI 0-5%) had a loculated fluid collection present only in the pelvis. After pelvic surgery, 22 of 48 (46%; CI 31-61%) patients had loculated fluid collections in the pelvis; no patient (0%; CI 0-7%) had a loculated collection present only in the abdomen. Loculated collections were present in both the abdomen and the pelvis in 4 of 69 (6%; CI 1.6-14%) patients after abdominal surgery and 3 of 48 (6%; CI 1.3-17%) after pelvic surgery.
  
  
  CONCLUSIONS
  Isolated pelvic abscesses after abdominal surgery and isolated abdominal abscesses after pelvic surgery appear to be very uncommon in oncologic patients. CT initially need be directed only to the region of surgery in this particular patient population.
authors.affiliation: Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.
authors.forename: J H
authors.initials: JH
authors.lastname: Krumenacker
authors.forename: D M
authors.initials: DM
authors.lastname: Panicek
authors.forename: M S
authors.initials: MS
authors.lastname: Ginsberg
authors.forename: A M
authors.initials: AM
authors.lastname: Bach
authors.forename: S
authors.initials: S
authors.lastname: Hilton
authors.forename: L H
authors.initials: LH
authors.lastname: Schwartz
mesh_terms: D018784:Abdominal Abscess / Q000000981:diagnostic imaging*; D000008:Abdominal Neoplasms / Q000150:complications* / Q000601:surgery; D000038:Abscess / Q000000981:diagnostic imaging*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016001:Confidence Intervals; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010386:Pelvic Neoplasms / Q000150:complications* / Q000601:surgery; D010388:Pelvis / Q000000981:diagnostic imaging*; D011183:Postoperative Complications / Q000000981:diagnostic imaging*; D011446:Prospective Studies; D011860:Radiography, Abdominal; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000379:methods / Q000706:statistics & numerical data