Atypical subsegmentectomy of multicentric and multistep progressive small hepatocellular carcinoma (HCC) using microwave tissue coagulator: A case report

A 69-year-old man with HCC was treated. Abdominal US, CT and angiography revealed three small nodules in S5, S6 and S8 segment of the liver. US pattern and CT density of the nodules were different each other.According to this findings, these nodules were thought to be multicentric growth of HCC. Using microwave tissue coagulator, limited atypical subsegmentectomy to each nodule was performed. Histological examination of resected specimens showed atypical adenomatous hyperplasia (AAH) in S8 segment, and coexistencce of AAH and middle or low grade HCC in each S5, S6 segment. On this histological findings, atypical subsegmentomy applied to this patient was suspected to be a reasonable operative method and radical operation in the result.