It seems that your mother is either overweight or obese that may be the reason to loose weight. Long standing overweight or obesity leads to deposition (storage) of excess fat in liver. So fatty liver
is a very common finding when obese person gets sonography, even he/she is asymptomatic. This excess fat in liver causes liver damage
if it remains in liver for very long time. At this time person usually complains of easy fatigibility, less desire to eat, mild upper abdominal discomfort
and liver specific blood test showed some sort of liver damage in form of elevated liver enzymes
In your mother's case, this is a warning sign that now weight loss
should be sincerely considered and to be maintained for forever. So consult your gastroenterologist who check blood liver enzyme levels and if they are normal or even elevated, follow strict plan for weight loss and opinion of your gastroenterologist. Your another query will also be welcomed.
Dr Avinash TANK