Spots on the liver can be various things but one of the most likely is a benign hemangioma which requires no action. One of the new terms is ’fat infiltration’ and without knowing your weight it is unfair to comment but in a society that is heading more and more to obesity, pretty much everyone has some fat in their liver.
The best thing to do is get any scans you can, a CAT scan may not be foolproof in confirming heangiomas but it is a good start. The liver can contain cysts which can be empty or contain fluid, either watery or mucus-like. Most of these are found by chance as you describe because they do not produce any symptoms. They are usually formed either due to old age or poor diet and lifestyle, although you should rule out Hydatid disease which can be caused by ingesting dog tape worm.
The best thing to do at the end of the day is to go back to your doctor, undergo any tests he suggests such as a biopsy or any further scans and he will be able to inform you exactly what the issue is. In the meantime, the best thing to keep your liver healthy is to eat well, with lots of vitamins and minerals, attempt to cut down on drinking and smoking and exercise as much as possible. You might consider running a liver cleanse if you feel comfortable with it but clarify with your doctor what the issue is before proceeding.
