Abstract
Mucocele of the appendix is defined as a state where an appendiceal lumen is filled with mucus. It is noted that one of the conditions for this occurrence is a lack of free communication between the appendiceal lumen and the cecal one. In this study we report a case of mucocele in which the free communication to the cecum was observed before operation.A 79-year-old female was admitted with the chief complaints of lower abdominal pain and a mass in the right lower quadrant. A plain X-ray film of the abdomen showed a fist-sized tumor shadow covered with calcification at the right iliac fossa. In addition, radiographic appearances of ultrasound sonography, computed tomography, and barium enema indicated a possibility of mucocele of appendix. Operation was performed. The tumor was found to be the swollen appendix like a cyst and drainaged to the cecum. Pathologically it was a mucinous cystadenoma of the appendix which had both acute and chronic inflammations.It is extremely rare to observe such a mucocele of the appendix with free communication to the cecal lumen. A possible explanation for the formation of the tumor is that after mucocele was formed by the blockade of the appendix, the blockade was corrupted by the repeated inflammation.
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