I had a upper right quadrant ultrasound. Results said " no distinct lesions, diffusely heterogeneous liver". What does diffusely Heterogeneous mean?

Possibly diet. Liver is affect by what we eat. For example alcohol can cause that appearance . Fatty foods also change the texture of the liver. There are various illness that also can change the liver. It is best talk to your doctor to see if there is an underlying reason. Sometimes it is just the way it is .