A 24-year-old, sexually active woman has experienced lower abdominal pain for the past day. Her temperature is 37.9deg C, and on palpation, the left lower abdomen is markedly tender. Laboratory findings include a total WBC count of 29,000/mm3 with 75% segmented neutrophils, 6% bands, 14% lymphocytes, and 5% monocytes. Laparotomy reveals a distended, fluid-filled, reddened left fallopian tube that is about to rupture. A left salpingectomy is performed. Which of the following is most likely to be seen on microscopic examination of the excised fallopian tube?
Fibroblastic proliferation Langhans giant cells Liquefactive necrosis Mononuclear infiltrates