Primary abscess of the omentum: A case report.

A Thai woman, 63 years old, presented with high grade fever, abdomino-pelvic mass with pain five days before admission. Physical examination and ultrasonography suspected an ovarian tumor with complication. The operation was performed three days after admission. The greater omental abscess was found, while other visceral organs were normal. Partial omentectomy was performed, and histopathological report showed acute and chronic inflammation with multiple microabscesses. Antimicrobial therapy was continued post-operatively until clinical improved. Although primary abscess of the omentum is uncommon, it should be included in the differential diagnosis of the inflammatory abdomino-pelvic mass.