Has anyone besides myself been told that their liver measures twelve inches from top to bottom?

That sounds awfully large.

The liver should be a wedge shaped organ that is tucked up under the right hand side of the ribcage.

Notes indicate the "normal" dimensions are approximately: 21-22.5 cm across its widest point, 15-17.5 cm at its greatest vertical height, and 10-12.5 cm from front to back.

So, yours is about twice the normal height.

Look up hepatomegaly on the WWW for additional information.

http://en.wikipedia.org/wiki/Hepatomegaly
http://www.nlm.nih.gov/medlineplus/ency/article/003275.htm

Keep away from Alcohol and Tylenol and discuss the liver tests with your doctor.