Hello - thanks for asking your question.
Please understand my limitations over the internet as I have neither met nor examined you. This information is for patient education only. Please see your personal physician for further evaluation.
First of all, congratulations on quitting drinking.
If you have completely normal liver enzymes, a liver ultrasound that only shows borderline hepatomegaly, and you are completely asymptomatic (i.e. no signs of liver failure), there is no obvious indication for a liver biopsy. Even though a biopsy would give a definitive answer, a biopsy is not without risk as it is an invasive procedure.
Alcohol itself can cause hepatomegaly - this result would not be surprising given your prior alcohol history. Note that you are still within the "upper" range of normal. It is reassuring that there is no abnormal echotexture seen - it makes fatty liver unlikely.
Given your normal tests and asymptomatic presentation, it would seem an extreme step to proceed to a liver biopsy. However, I would discuss this with your personal physician.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Thanks,
Kevin, M.D.