Abstract
We report rate case of primary hepatic actinomycosis. A 52-year-old man had undergone pancreatoduodenectomy for carcinoma of the ampulla of Vater 4 years earlier. He was admitted to our hospital for detailed examination of a small nodular lesion in the liver. Abdominal ultrasonography revealed a hypoechoic lesion, 2.0cm in diameter, in S6. A CT scan showed a low density area. T1 weighted MRI revealed a homogenous hypointense lesion. T2 weighted MRI revealed an isointense internal nodule surrounded by a hyperintense peripheral rim. A celiac arteriogram of the lesion showed no definite nodular staining. The posterior segment was partially resected under the suspicion of metastatic tumor. Histological findings revealed abscess-forming inflammation with fibrosis, in which radiating granules were found. There was no evidence of malignancy.
