I don't have anything concrete to say personally but you should research on a known-to-be-trustworthy site, like mayoclinic.com. Their opening statement is, "Normally, an adult liver is about the size of a small football. Sometimes, however, the liver becomes enlarged. This is known as enlarged liver, or hepatomegaly (hep-uh-to-MEG-uh-le). Enlarged liver isn't a disease. It's a sign of an underlying problem, such as hepatitis, congestive heart failure or cancer. Treatment of an enlarged liver depends on the cause."
I hope all goes well for your friend.
Be well, John
I have to get up the creek! Now where's that paddle?