Diseases & conditions A-Z List
Diseases & Conditions A-Z List - «H»:
Hemophilia B is a hereditary bleeding disorder caused by a lack of blood clotting factor IX. Without enough factor IX, the blood cannot clot properly to control bleeding.
See also: Coagulation disorder
Hemophilia B is caused by an inherited X-linked recessive trait, with the defective gene ...
Hemorrhage is the medical term for bleeding, usually excessive bleeding. Hemorrhagic diseases are caused by, or result in, bleeding (hemorrhaging).
Primary thrombocythemia (hemorrhagic thrombocythemia)
Dengue hemorrhagic fever
Hemorrhagic disease of the newborn
Hemorrhagic disease of the newborn is a bleeding disorder that usually develops shortly after a baby is born.
A lack of vitamin K causes hemorrhagic disease of the newborn. Vitamin K plays an important role in blood clotting.
Babies usually have low levels of vitamin K for a variety of reaso...
Hemorrhoid surgery is the removal of swollen veins around the anus (hemorrhoids). Hemorrhoids can be inside or outside of the skin around the rectum.
Hemorrhoids can be surgically removed using a special stapler or sutures (stiches). You may be sedated and pain-free (local or spinal ane...
Hemorrhoids are painful, swollen veins in the lower portion of the rectum or anus.
This condition is very common, especially during pregnancy and after childbirth. Hemorrhoids result from increased pressure in the veins of the anus. The pressure causes the veins to bulge and expand, making t...
Hemothorax is a collection of blood in the space between the chest wall and the lung (the pleural cavity).
The most common cause of hemothorax is chest trauma. It can also occur in patients who have:
A defect of blood clotting
Blunt trauma to the chest
Death of lung tissue (pulmonary infarc...
A Hemovac drain was placed under your skin during surgery. This drain removes any blood or other fluids that might build up in this area. You can go home with the drain still in place.
Your health care provider will tell you how often you need to empty the drain. Your nurse will show you how to empt...
Henoch-Schonlein purpura is a disease that involves purple spots on the skin, joint pain, gastrointestinal problems, and glomerulonephritis (a type of kidney disorder).
Henoch-Schonlein is caused by an abnormal response of the immune system. It is unclear why this occurs.
The syndrome is usu...
Hepatic encephalopathy is a worsening of brain function that occurs when the liver is no longer able to remove toxic substances in the blood.
Hepatic encephalopathy is caused by disorders that affect the liver. These include disorders that reduce liver function (such as cirrhosis or hepatit...
A hepatic hemangioma is a noncancerous liver tumor made of widened (dilated) blood vessels.
A hepatic hemangioma is the most common noncancerous tumor of the liver. It is believed to be a birth defect.
Hepatic hemangiomas can occur at any time, but are most common in people in their 30s - 50...
Hepatic ischemia is a condition in which the liver does not get enough blood or oxygen, causing injury to liver cells.
Low blood pressure from any condition can lead to hepatic ischemia. Such conditions may include:
Abnormal heart rhythms
Hepatic vein obstruction (Budd-Chiari)
Hepatic vein obstruction is a blockage of the hepatic vein, which carries blood away from the liver.
Hepatic vein obstruction prevents blood from flowing out of the liver and back to the heart. This blockage can cause liver damage. Obstruction of this vein can be caused by a tumor or growth ...
Hepatitis is inflammation of the liver.
The disease can be caused by:
Infections from viruses (such as hepatitis A, B, or C), bacteria, or parasites
Liver damage from alcohol or poisonous mushrooms
Medications, such as an overdose of acetaminophen, which can be deadly
Immune cells in the bo...
Hepatitis A - vaccine
The hepatitis A vaccine protects you against a type of liver infection called hepatitis A. The vaccine will not protect you from other types of hepatitis.
The vaccine, called Havrix or VAQTA, is made from inactivated whole virus of hepatitis A. The inactive virus stimulates your body to...
Hepatitis B is inflammation (irritation and swelling) of the liver due to the hepatitis B virus (HBV).
Other types of hepatitis include:
Chronic persistent hepatitis
The hepatitis B virus ...