Hepatic granuloma resulting from Enterobius vermicularis.

A nodule of the liver was incidentally noted during left colectomy for a large villous adenoma in a 74-year-old man. Microscopic examination disclosed a granuloma of the liver containing numerous Enterobius vermicularis ova and a cross-section of the nematode. This is the fourth reported case of hepatic oxyuriasis and the second case reported in North America.