[Dynamic CT scan of hepatic tumors].

Abstract

Dynamic CT manifestations in 44 cases of hepatic tumors proved by pathology were reviewed. 30 were hepatoma, 6 metastatic tumor, 7 cavernous hemangioma and 1 adenoma. 50 ml of contrast medium were administered as a bolus injection, and scanning was performed at 15, 25, 60, 120 and 300 sec after injection. The tumor enhancement patterns were divided into 3 types based on time-density curve. Type 1 manifested rapid and prolonged marked tumor enhancement; Type 2 was characterized by a rapid rise followed by a rapid decline in tumor density; In type 3 there was no significant change over time in density of the tumor. All cavernous hemangiomas belonged to type 1. Type 2 and 3 were not specific. Parafocal enhancement which occurred in 83.3% of primary hepatic carcinoma in this article and without false positive cases was considered by the authors to be pathognomonic of hepatoma. Evaluation was also made of dynamic CT in treatment planning of hepatic tumors.