Liver
There are many different liver diseases.<ref> Dancygier, Henryk 2010. Clinical hepatology, principles and practice of. Springer. pp. 895–. ISBN 978-3-642-04509-7</ref> Liver disease can make someone very sick because of all the important work the liver does. People who have bad liver disease usually die unless they can get a liver transplant. This is when the liver from someone who has just died is put in another person by surgery. Such surgeries are usually technically challenging but can be life-saving.