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Diagnostic ultrasound ( PDFDrive )

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286 PART II Abdominal and Pelvic Sonography

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FIG. 8.33 Perforation of Appendix in Three Patients. (A) Long-axis image and (B) cross-sectional image show the blind-ended appendix.

There is loss of deinition of the wall layers, and the appendix is surrounded by an echogenic mass effect representing inlamed fat in the mesoappendix.

(A) Arrow points to a bubble of extraluminal gas at the tip of the appendix; tip perforation was conirmed at surgery. (C) Sonogram and

(D) CT scan show a periappendiceal abscess. The decompressed appendix is seen centrally on the sonogram. (E) Long-axis and (F) transverse

images in the right lower quadrant show an abscess with an escaped appendicolith with acoustic shadowing. The appendix is no longer visible.

See also Video 8.14. (C with permission from Birnbaum B, Wilson S. Appendicitis at the millennium. Radiology. 2000;215[2]:337-348. 48 )

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