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- Title
T1 bright appendix sign to exclude acute appendicitis in pregnant women.
- Authors
Shin, Ilah; An, Chansik; Lim, Joon; Kim, Myeong-Jin; Chung, Yong; Lim, Joon Seok; Chung, Yong Eun
- Abstract
<bold>Objective: </bold>To evaluate the diagnostic value of the T1 bright appendix sign for the diagnosis of acute appendicitis in pregnant women.<bold>Material and Methods: </bold>This retrospective study included 125 pregnant women with suspected appendicitis who underwent magnetic resonance (MR) imaging. The T1 bright appendix sign was defined as a high intensity signal filling more than half length of the appendix on T1-weighted imaging. Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of the T1 bright appendix sign for normal appendix identification were calculated in all patients and in those with borderline-sized appendices (6-7 mm).<bold>Results: </bold>The T1 bright appendix sign was seen in 51% of patients with normal appendices, but only in 4.5% of patients with acute appendicitis. The overall sensitivity, specificity, PPV, and NPV of the T1 bright appendix sign for normal appendix diagnosis were 44.9%, 95.5%, 97.6%, and 30.0%, respectively. All four patients with borderline sized appendix with appendicitis showed negative T1 bright appendix sign.<bold>Conclusion: </bold>The T1 bright appendix sign is a specific finding for the diagnosis of a normal appendix in pregnant women with suspected acute appendicitis.<bold>Key Points: </bold>• Magnetic resonance imaging is increasingly used in emergency settings. • Acute appendicitis is the most common cause of acute abdomen. • Magnetic resonance imaging is widely used in pregnant population. • T1 bright appendix sign can be a specific sign representing normal appendix.
- Subjects
APPENDICITIS diagnosis; PREGNANCY complications; MAGNETIC resonance imaging; APPENDIX (Anatomy); APPENDIX diseases; ABDOMINAL pain; PREGNANT women
- Publication
European Radiology, 2017, Vol 27, Issue 8, p3310
- ISSN
0938-7994
- Publication type
journal article
- DOI
10.1007/s00330-016-4727-2