An 18-year-old woman presents with abdominal pain localized to the right lower quadrant, nausea and vomiting, mild fever, and an elevation of the peripheral leukocyte count to 17,000/uL. Examination of the surgically resected appendix is most likely to reveal
An appendix with a normal appearance Neutrophils within the muscular wall Lymphoid hyperplasia and multinucleated giant cells within the muscular wall A dilated lumen filled with mucus