With normal liver enzymes, it is unlikely that there is a major liver disease present. There are some cases of alcohol (i.e. alcoholic hepatitis) that can enlarge the liver, but with normal liver enzymes, this is less likely.
You can continue to monitor the size of the liver via serial ultrasounds if this is concerning. It is possible that the enlarged liver is an anatomical variant.
Regarding the Tylenol - typically taking less than 4 grams of Tylenol will not damage the liver.
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.
Kevin, M.D.
Medical Weblog:
kevinmd_b