For the evaluationof the role of computed tomography in diagnosis and treatment of hepatic abscess authors reviewed 50 computed tomographic scans in 45 patients of confirmed hepatic abscess retrospectively. the results were as follows 1. The hepatic abscesses were caused by pyogenic infections in 34 patients (76%) amebic infections in five (11%) mixed infections in six(13%) the most common bacteria responsible for infection were E-coli(53%) 2. Predisposing facters could be identified in 26 cases including biliary tract disease intraadominal surgery pancreatitis. 3. Multiple lesions were found in 48%. 4. Multiloculations within single cavity were present in 32% in 2 cases finer multiloculationwas seen. 5. Calcificationin the abscess wall was seen in 3 cases. 6. Previously reported "highly suspected abscess findings" such as gas within lesion rim enhancement and double target sign were seen in 14% 26% 6% respectively. 7. The CT appearance of hepatic abscess was variable so we classified them 4 patterms. la type (30%) : A hypodense central area surrounded by less hypodense zone were ween on precontrast scan. Following contrast media infusion the central hypodense area became nonenhancing well defined hypodense area and the peripheral hypodense zone became isodense with liver parenchyma. lb type (8%) : A hypodense central area surrounded by less hypodense rim was seen on precontrast scan. Following contrast media infusion they showed double target appearance. ll type(24%) : Poorly defined hypodense area was seen on precontrast scan. Following contrast media infu-sion the center of the hypodense area became a well defined non-enhancing hypodense area and the periphery of the lesion became isodense with liver parencyma so the lesion became smaller in size on post-contrast scan.rast scan.