The patient was a 35-year-old woman. A 20 mm single nodule was found in the medial segment of the liver by ultrasonography. All laboratory tests were within the normal limits and all viral markers were negative. Computed tomography revealed a relatively hypodense lesion in segment 3 and 4, which was gradually enhanced. Surrounding area of the lesion was strongly enhanced in arterial phase and isodense in late phase. In magnetic resonance imaging, the lesion was isointense in arterial phase and low intense in hepatocyte phase. Since these radiological findings could not rule out a malignancy and the demarcation of the tumor was unclear, we performed left hepatectomy. The postoperative course was uneventful. Histological findings revealed the final diagnosis of reactive lymphoid hyperplasia. The present patient is the youngest case reported in our country and the radiological findings of the tumor were different from the past reported cases.
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