Mucocoele of the appendiceal stump
Appendicectomy 6 weeks ago, now increasing RIF pain
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C+ portal venous phase
Fluid filled distension of the appendiceal stump with a line of surgical staples at the tip of the stump. Minimal surrounding inflammatory change.
The appendiceal stump is usually buried or inverted into the caecum at surgery to prevent complications including leak, "stumpitis" and mucocoele. In this case a line of surgical staples has been used across the proximal appendix without inversion leaving a small segment of stump allowing a mucocoele to develop.