Heterogeneity means a lack of uniformity. Normally an organ will appear uniform in appearance when examined by ultrasound or scan. The liver has different lobes and they are not all strictly uniform in appearance.
There are so many factors and conditions relating to this that it would be merely guesswork as to possible underlying causes. A gI is really the best place to start for evaluation. I'm glad to know that she is getting in soon. Waiting can be such an anxiety filled time.
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