From the case:
Appendiceal mucocoele
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The typical onion layer appearance on ultrasonography within the distended appendix.
From the case:
Appendiceal mucocoele
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Info

Distended appendix with a dense focal region of wall calcification.
Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines
Case Discussion
These images demonstrate typical onion layer appearance on ultrasonography within the distended appendix, while the CT image shows distended appendix with a dense focal region of wall calcification.