Preoperative diagnosis of appendiceal mucoceles is rare. If untreated,
one type of mucoceles may rupture producing a potentially fatal entit
y known as pseudomyxoma peritonei. The importance of diagnosing append
iceal mucoceles is highlighted through a case presentation of a woman
who had an incidental finding of mucinous cystadenoma of the appendix
during colonoscopic evaluation for occult gastrointestinal bleeding. A
detailed review of the medical literature regarding appendiceal mucoc
eles is presented, with emphasis on the pathologic, clinical, radiolog
ic, and evolving endoscopic features. Surgical options and prognosis a
re discussed.