BACKGROUND:?Bacterial hepatic abscess usually is acute and progressive, often resulting in sepsis, impairment of liver function and disseminated intravascular coagulation. The mortality rate was as high as 80%in the past. For the purpose of early diagnosis and differential diagnosis of this disease, we probed the imaging manifestations and their characteristics in bacterial hepatic abscesses by CT scan. <br> METHODS:Twenty-four lesions from 21 patients with bacterial hepatic abscesses that were conifrmed by clinical features, puncture and culture were reviewed for CT manifestations. Fourteen patients were male and 7 were female, with an average age of 56.2 years. All lesions underwent CT plain scan and three-phase enhanced scan and 15 patients underwent delayed-phase imaging. Three senior radiologists read the iflms in accordance with a standard. <br> RESULTS:?Among 24 lesions, 18 (75%) were situated in the right liver with diameters of 1.4-9.3 cm (average 4.5 cm). Nineteen (79.2%) lesions were round or sub-round in shape, and 22 (91.7%) had smooth, uninterrupted and sharp edges. All lesions showed low attenuation of less than 20 Hu. Twenty-two enhanced lesions (91.7%) had rim-shaped enhancement in the abscess wall, and 13 (54.2%) showed single or double-ring signs. Eighteen (75%) displayed honeycomb-like, grid-like or strip-like enhancement. Eighteen (75%) were regionally enhanced in the surroundings or upper or lower layers. Only 2 (8.3%) displayed a gas-liquid surface sign. <br> CONCLUSIONS:? The CT ifndings of bacterial hepatic abscess are usually typical, and the diagnosis of the abscess is not dififcult. To precisely diagnose atypical cases, it is necessary to combine CT with clinical observations and follow-up.
hepatic abscessbacterialCTimaging characteristics
Cheng-Lin Wang、Xue-Jun Guo、Shui-Bo Qiu、Yi Lei、Zhi-Dong Yuan、Han-Bin Dong、Hui-An Liu
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Department of Imaging, Peking University Shenzhen Hospital Wang CL, Guo XJ and Yuan ZD；Department of Imaging, No. 2 People's Hospital of Shenzhen Qiu SB and Lei Y；Department of Imaging, No. 4 People's Hospital of Shenzhen Dong HB；and Department of Imaging, Buji People's Hospital of Shenzhen Liu HA, Shenzhen 518036, China
Clinical Research Division, Wujieping Medical Foundation of China
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