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Radiology, Vol 145, 123-126, Copyright © 1982 by Radiological Society of North America

ARTICLES

Sonographic findings in hepatic amebic abscess

PW Ralls, PM Colletti, MF Quinn and J Halls

Sonograms of 143 hepatic amebic abscesses in 106 patients were analyzed retrospectively. A strongly suggestive but not pathognomonic pattern was noted in 54 abscesses (37.8%), consisting of (a) lack of significant wall echoes, (b) a round or oval configuration, (c) less echogenicity than the normal parenchyma, with fine, homogeneous low- level echoes throughout at high gain, (d) a location contiguous to the liver capsule, and (e) distal sonic enhancement. Most other hepatic abscesses (53.1%) had all but one or two of these features. Thirteen patients (9%) had bizarre sonographic findings. Peripheral or central areas of increased echogenicity occurred more frequently than previously reported. At normal gain settings, most lesions (53.8%) were predominantly anechoic. The above pattern and trans-diaphragmatic pleural involvement were helpful in the diagnosis.


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