As with many semi-diagnostic symptoms, white spots on the liver could be a symptom of many different things, but are not, on their own, conclusively diagnostic of any one disease or illness.
White spots on the liver could for instance indicate fibrous tissue - and this in itself could be the result of inflammation or of cysts (in the case of echinoccal infection). If the spots are due to cyst formations, a surgery is normally required to remove them.
White spots could also be an indicator of non-alcoholic fatty liver disease, or of issues with the gall bladder.
In children, white spots on the liver tend to be treated seriously, as they could be symptomatic of liver disease or even a form of cancer, and so if the patient is a child, they are treated as more highly diagnostic (since it is unlikely children would have developed inflammation of the liver or cysts, for instance).
- I'm Not A Doctor, And I Don't Even Play One On The Web
The bottom line on white spots on the liver however, is while they could be symptomatic of one of many things, there is no non-medical way in which to make an accurate diagnosis, so it is best to take the advice of your doctor immediately on their discovery. The context of the spots, the age and lifestyle of the patient will all add contextual information to the white spots, and allow a trained medical practitioner to make a sound diagnosis of their meaning, their level of seriousness and any necessary action that should be taken to deal with them.