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The most accurate way to diagnose the type of liver disease is by doing a liver biopsy, although a biopsy is not necessary in most cases. This procedure involves removing, with a thin hollow needle, a small piece of liver tissue for microscopic study. The tiny tissue sample is usually representative of the disease (pathology) in the rest of this large organ. Put another way, most liver disease involves the entire liver. When the disease is localized to only a small part of the liver, as for example, cancer usually is, the biopsy can be done with ultrasonic visual guidance to be certain that the small, involved area is biopsied.
The liver has an extraordinary capacity to regenerate (reproduce itself). For example, when the liver is damaged, it will soon regenerate in an attempt to restore its functions. Cut out a part of the liver, and it likewise will grow back (regenerate) rapidly. In fact, when a person donates a part of her or his liver for transplantation, much of the part that is removed will soon grow back.
There's a famous story in Greek and Roman mythology that testifies to the liver's great capacity to regenerate. Witness Prometheus chained to a rock on a mountain. This confinement was his punishment because he had displeased the ruler Zeus (Jupiter, if you prefer Latin to Greek) by providing fire (and other benefits) to humankind. Picture a vulture pecking away at the liver of the helpless Prometheus. He survived, however, according to the legend, because his liver renewed itself as fast as the vulture devoured it.
Medically reviewed by John A. Daller, MD; American Board of Surgery with subspecialty certification in surgical critical care
Medically Reviewed by a Doctor on 5/25/2016
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