Outer Diameter of the Vermiform Appendix: Not a Valid Sonographic Criterion for Acute Appendicitis in Patients with Cystic Fibrosis
Renaud Menten1,
Patrick Lebecque2,
Christine Saint-Martin1 and
Philippe Clapuyt1
1 Department of Pediatric Radiology, Cliniques Universitaires Saint Luc, 10,
avenue Hippocrate, Brussels B1200, Belgium.
2 Department of Pediatric Pneumology, Cliniques Universitaires Saint Luc,
Brussels, Belgium.

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Fig. 1. Cross-sectional sonogram of normal appendix in 10-year-old
boy. Calipers are placed at outer borders of muscularis propria.
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Fig. 2. 11-year-old girl with cystic fibrosis. Sonogram shows
enlarged appendix. Mucous plug is indistinguishable from mucosa.
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Fig. 3. Box-and-whiskers graph shows difference in patient
distribution for outer diameter of appendix between cystic fibrosis patients
with sufficient pancreatic enzyme and those without sufficient pancreatic
enzyme. Box represents absolute minimum and maximum diameters; whiskers
represent SD; and bar in center of box represents median value.
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Copyright © 2005 by the American Roentgen Ray Society.