Diseases & conditions A-Z List
Diseases & Conditions A-Z List - «H»:
Hepatitis B vaccine
The hepatitis B vaccine protects against hepatitis B, a serious disease that damages the liver. The vaccine is one of the recommended childhood immunizations.
The vaccine is made from inactivated whole virus of hepatitis B. The inactive virus stimulates your body to produce antibodies t...
Hepatitis C is a viral disease that leads to swelling (inflammation) of the liver.
Hepatitis C infection is caused by the hepatitis C virus (HCV). People who may be at risk for hepatitis C are those who:
Have been on long-term kidney dialysis
Have regular contact with blood at work (for ins...
Hepatitis virus panel
The hepatitis virus panel is a series of blood tests used to detect current or past infection by hepatitis A, hepatitis B, or hepatitis C. It can screen blood samples for more than one kind of hepatitis virus at the same time.
Antibody and antigen tests can detect each of the different hepatitis vi...
Hepatocellular carcinoma is cancer of the liver.
Hepatocellular carcinoma accounts for most liver cancers. This type of cancer occurs more often in men than women. It is usually seen in people ages 50 - 60.
The disease is more common in parts of Africa and Asia than in North or South America...
Hepatocerebral degeneration is a brain disorder that occurs in people with liver damage.
This condition may occur in any case of acquired liver failure, including hepatitis.
Liver damage can lead to the build-up of ammonia and other toxic materials in the body. This happens when the liver do...
Hepatomegaly is swelling of the liver beyond its normal size.
If both the liver and spleen are enlarged, it is called hepatosplenomegaly.
See also: Splenomegaly
The lower edge of the liver normally comes just to the lower edge of the ribs (costal margin) on the right side. The edge ...
Hepatorenal syndrome is a condition in which there is progressive kidney failure in a person with cirrhosis of the liver. It is a serious and often life-threatening complication of cirrhosis.
Hepatorenal syndrome occurs when there is a decrease in kidney function in a person with a liver dis...
Hereditary amyloidosis is a condition in which abnormal protein deposits (called amyloid) form in almost every tissue in the body. These protein deposits damage the tissues and interfere with the function of the involved organs.
Hereditary amyloidosis is passed down from parents to their chi...
Hereditary angioedema is a rare but serious problem with the immune system that is passed down through families. It causes swelling, particularly of the face and airways, and abdominal cramping.
See also: Angioedema
Hereditary angioedema (HAE) is caused by low levels or improper function of...
Hereditary elliptocytosis is a disorder passed down through families in which the red blood cells are abnormally shaped.
Elliptocytosis affects about 1 in every 2,500 people of northern European heritage. It is more common in ...
Hereditary fructose intolerance
Hereditary fructose intolerance is a disorder in which a person lacks the protein needed to break down fructose. Fructose is a fruit sugar that naturally occurs in the body. Man-made fructose is used as a sweetener in many foods, including baby food and drinks.
This condition occurs when the...
Hereditary ovalocytosis is rare condition passed down through families (inherited) in which blood cells are slightly oval-shaped instead of round. It is a form of hereditary elliptocytosis.
Ovalocytosis is mainly found in Southeast Asian populations.
Newborn infants with ovalocytosi...
Hereditary urea cycle abnormality
Hereditary urea cycle abnormality is an inherited condition that can cause problems with the removal of waste from the body in the urine.
The urea cycle is a process in which waste (ammonia) is removed from the body. When you eat proteins, the body breaks them down into amino acids. Ammonia ...
A hernia is usually a sac formed by the lining of the abdominal cavity (peritoneum). The sac comes through a hole or weak area in the fascia, the strong layer of the abdominal wall that surrounds the muscle.
The types of hernias are based on where they occur:
Inguinal hernia appears as a bulge in t...
A herniated (slipped) disk occurs when all or part of a spinal disk is forced through a weakened part of the disk. This places pressure on nearby nerves.
Acute low back pain
Chronic low back pain
The bones (vertebrae) of the spinal column run down the back, connect...