Hi Enlarged liker with increased echotexture means its fatty change in the liver.also called hepatic steatosis.it is due to so many causes. Based on cause it is called alcoholic and nonalcolic hepatosteatosis(NASH).this non alcoholic can be due to obesity,excessive intake of fats/ rice items, diabetes, poly cystic ovarian diseases and some hormonal excess. We cant say this is the cause in your mom without examining .when fat depoit in live it causes enlargement of liver .if it not checked it may cause hepatitis , liver cell disfunction..it is completely reversible.dietary measures like avoid fried fatty foods and encourage green leavy vegetables and fruits.start mild exercises like walking. Thank you Vasundhara