A 60-year-old man who complained of persistent right lower quadrant pain underwent an appendectomy. The appendix appeared globular and dilated due to an obstruction by a fecalith. It was filled with mucus. Histologically, the cavity was lined with normal appendiceal mucosa; there was no evidence of neoplasia. This lesion most likely represents a

Question

Quizplus · Accepted Answer

A mucocele is a dilatation of the appendix in which the lumen of the appendix is filled with mucus. It results from an obstruction of the appendix by a fecalith or chronic inflammation, and less often by tumors.

A 60-Year-Old Man Who Complained of Persistent Right Lower Quadrant