Abstract
The case involved a 66-year-old man on medical treatment for diabetes mellitus. He had felt a tumor over the navel since five months earlier but let it alone because the tumor was asymptomatic. However, he was seen at a hospital because the tumor had gradually grown with pain, and he was referred to our hospital. On laboratory data, the CRP level was 1.26 mg/dl, showing mild increase in inflammatory reaction. Abdominal CT scan and MRI revealed a tumorous lesion with the longer diameter of 5 cm on the ventral aspect of the transverse colon. Inflammation due to omental infarction, metastasis or infection was likely. Elective surgery was performed. The histopathological diagnosis was primary abscess of the omentum, because we observed proliferation of spindle-shaped cells and high degree of infiltration of inflammatory cells in the interlacing collagen fivers as the background, as well as necrotized tissue which had formed abscess.
Abscess of the omentum, especially primary abscess of the omentum, is rare and so far few cases have been reported in Japan. We herein report a case of primary abscess of the omentum which was surgically resected with the uneventful postoperative course, together with a review of the literature.
