Extended central bisegmentectomy--an en bloc resection of hepatic segments 4, 5, 8 and 7: report of a case.

We herein present an example of an extended central bisegmentectomy in a patient with a large hepatocellular carcinoma. According to a magnetic resonance imaging study, the right hepatic vein was displaced and narrowed at its origin and a large inferior right hepatic vein was revealed. In this case, owing to the only slightly functional remaining hepatic reserve, an extended central bisegmentectomy was selected as the optimum treatment. The postoperative course was uneventful except for some bile leakage. Twelve months after operation, the patient is still alive and no sign of recurrence has been detected. The extended central bisegmentectomy is an en bloc resection of hepatic segments 4, 5, 7, and 8. When the large inferior right hepatic vein is present, segment 6 can be preserved even when the right hepatic vein is sacrificed at its origin.