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Diseases & conditions A-Z List

Diseases & Conditions A-Z List - «G»:

  1. Glucagon Glucagon
    A glucagon test measures the amount of a hormone called glucagon in your blood. Glucagon is produced by cells in the pancreas. It helps control blood sugar levels. How the Test is Performed Blood is typically drawn from a vein, usually from the inside of the elbow or the back of the hand. The site ...
  2. Glucagonoma Glucagonoma
    Glucagonoma is a very rare tumor of the islet cells of the pancreas, which release the hormones insulin and glucagon. Causes Glucagonoma is usually cancerous (malignant). The cancer tends to spread and get worse. This cancer affects the islet cells of the pancreas. As a result, they produce too muc...
  3. Glucose test - blood Glucose test - blood
    A blood glucose test measures the amount of a sugar, called glucose, in a sample of your blood. Glucose is a major source of energy for most cells of the body, including those in the brain. The carbohydrates you eat eventually end up as glucose in the blood. See also: Glucose test - CSF Glucose ...
  4. Glucose test - urine Glucose test - urine
    The glucose urine test measures the amount of sugar (glucose) in a urine sample. The presence of glucose in the urine is called glycosuria or glucosuria. See also: Glucose test - blood Glucose test - CSF Home glucose monitoring How the Test is Performed A urine sample is needed. For informa...
  5. Glucose tolerance test Glucose tolerance test
    The glucose tolerance test is a laboratory method to check how the body breaks down (metabolizes) sugar. How the Test is Performed The most common glucose tolerance test is the oral glucose tolerance test (OGTT). You cannot eat or drink anything after midnight before the test. For the test, you wil...
  6. Glucose-6-phosphate dehydrogenase Glucose-6-phosphate dehydrogenase
    Glucose-6-phosphate dehydrogenase (G6PD) is a type of protein, called an enzyme, that helps red blood cells work properly. The G6PD test looks at the amount (activity) of this substance in a patient's red blood cells. How the Test is Performed Blood is typically drawn from a vein, usually from the ...
  7. Glucose-6-phosphate dehydrogenase deficiency Glucose-6-phosphate dehydrogenase deficiency
    Glucose-6-phosphate dehydrogenase (G-6-PD) deficiency is a hereditary condition in which red blood cells break down when the body is exposed to certain drugs or the stress of infection. Causes G6PD deficiency occurs when a person is missing or doesn't have enough of an enzyme called glucose-6-phosp...
  8. Glucuronyl transferase Glucuronyl transferase
    Glucuronyl transferase is a liver enzyme. It changes bilirubin into a form that can be removed through the bile. It also changes some hormones, medicines, and toxins into non-harmful products. If the body does not produce enough glucuronyl transferase, jaundice can occur. ...
  9. Goiter - simple Goiter - simple
    A goiter is an enlargement of the thyroid gland. It is not cancer. See also: Colloid nodule goiter Toxic nodule goiter Causes There are different kinds of goiters. A simple goiter can occur for no known reason, or when the thyroid gland is not able to produce enough thyroid hormone to meet the ...
  10. Gonococcal arthritis Gonococcal arthritis
    Gonococcal arthritis is inflammation of a joint (usually just one) due to a gonorrhea infection. See also: Non-gonococcal bacterial arthritis Causes Gonococcal arthritis is a bacterial infection of a joint. It occurs in people who have gonorrhea. It affects women more often than it affects men, an...
  11. Gonorrhea Gonorrhea
    Gonorrhea is a common sexually transmitted disease (STD). See also: Disseminated gonococcemia Causes Gonorrhea is caused by the bacteria Neisseria gonorrhoeae. Anyone who has any type of sex can catch gonorrhea. The infection can be spread by contact with the mouth, vagina, penis, or anus. The bact...
  12. Goodpasture syndrome Goodpasture syndrome
    Goodpasture syndrome is a rare disease that can involve rapidly progressive kidney failure along with lung disease. However, some forms of the disease involve just the lung or kidney, not both. Causes Goodpasture syndrome is an autoimmune disorder, a condition that occurs when the immune system mis...
  13. Gout Gout
    Gout is a kind of arthritis that occurs when uric acid builds up in the joints. Acute gout is a painful condition that typically affects one joint. Chronic gout is repeated episodes of pain and inflammation, which may involve more than one joint. Causes Gout is caused by having higher-than-norma...
  14. Graft-versus-host disease Graft-versus-host disease
    Graft-versus-host disease (GVHD) is a complication that can occur after a stem cell or bone marrow transplant in which the newly transplanted material attacks the transplant recipient's body. See also: Transplant rejection Causes GVHD occurs in a bone marrow or stem cell transplant involving a don...
  15. Gram stain of skin lesion Gram stain of skin lesion
    A gram stain of a skin lesion is a laboratory test that uses special stains to detect and identify bacteria in a sample from a skin sore. The gram stain method is one of the most commonly used techniques for the rapid diagnosis of bacterial infections. How the Test is Performed Your health care pro...