#liver_disease__liverdisease  a disease affecting the liver
  supertype:  disease  an impairment of health or a condition of abnormal functioning
  subtype:  cirrhosis_of_the_liver__cirrhosis__cirrhosi  a chronic disease interfering with the normal functioning of the liver; the major cause is chronic alcoholism
  subtype:  fatty_liver__fattyliver  yellow discoloration as a result of the accumulation of certain fats (triglycerides) in the liver; can be caused by alcoholic cirrhosis or pregnancy or exposure to certain toxins
  subtype:  hepatitis__hepatiti  inflammation of the liver caused by a virus or a toxin
     subtype:  viral_hepatitis__viralhepatiti  hepatitis caused by a virus
        subtype:  hepatitis_A__infectious_hepatitis  an acute but benign form of viral hepatitis caused by an RNA virus that does not persist in the blood serum and is usually transmitted by ingesting food or drink that is contaiminated with fecal matter
        subtype:  hepatitis_B__serum_hepatitis  an acute (sometimes fatal) form of viral hepatitis caused by a DNA virus that tends to persist in the blood serum and is transmitted by sexual contact or by transfusion or by ingestion of contaminated blood or other bodily fluids
        subtype:  hepatitis_C  a viral hepatitis clinically indistinguishable from hepatitis B but caused by a single-stranded RNA virus; usually transmitted by parenteral means (as injection of an illicit drug or blood transfusion or exposure to blood or blood products)
     subtype:  hepatitis_delta__hepatitisdelta__delta_hepatitis__deltahepatiti  a severe form of hepatitis
  subtype:  liver_cancer__livercancer__cancer_of_the_liver  malignant neoplastic disease of the liver usually occurring as a metastasis from another cancer; symptoms include loss of appetite and weakness and bloating and jaundice and upper abdominal discomfort

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