Glossary of Cancer Related Terms G - I

G

Granulocyte

A type of white blood cell that kills bacteria.

Groshong catheter

See Central venous catheter.

Guaiac test

A test that checks for hidden blood in the stool.

H

Hematocrit (Hct)

The percentage of red blood cells in the blood. A low hematocrit measurement indicates anemia.

Hematologist

A doctor who specializes in the problems of blood and bone marrow.

Hematology

The science that studies the blood.

Hematuria

Blood in the urine.

Hemoccult (Guaiac) test

A test that checks for hidden blood in the stool.

Herpes simplex

The most common virus that causes sores often seen around the mouth, commonly called cold sores.

Herpes zoster

A virus that settles around certain nerves causing blisters, swelling, and pain. This condition is also called shingles.

Hickman catheter

A special intravenous tubing that is surgically inserted into a large vein near the heart. See central venous catheter.

Hodgkin's disease

A cancer that affects the lymph nodes. See Lymphoma.

Hormones

Substances secreted by various organs of the body that regulate growth, metabolism, and reproduction.

Hospice

A concept of supportive care to meet the special needs of patients and family during the terminal stages of illness. The care may be delivered in the home or hospital by a specially trained team of professionals.

Human immunodeficiency virus (HIV)

The virus that causes AIDS.

Human leukocyte antigen test (HLA)

A special blood test used to match a blood or bone marrow donor to a recipient for transfusion or transplant.

Hyperalimentation

The intravenous administration of a highly nutritious solution.

I

Ileostomy

A surgical opening in the abdomen connected to the small intestine to allow stool to be emptied into a collection bag.

Immunity (Immune system)

The body's ability to fight infection and disease.

Immunosuppression

Weakening of the immune system that causes a lowered ability to fight infection and disease.

Immunotherapy

The artificial stimulation of the body's immune system to treat or fight disease.

Infiltration

The leaking of fluid or medicines into tissues, which can cause swelling.

Infusion

Delivering fluids or medications into the bloodstream over a period of time.

Infusion pump

A device that delivers measured amounts of fluids or medications into the bloodstream over a period of time.

Injection

Pushing a medication into the body with the use of a syringe and needle.

Intramuscular (IM) injection

Into the muscle.

Intravenous (IV) injection

Into the vein.

Subcutaneous injection

Into the fatty tissue under the skin.

Interferon

A naturally produced chemical released by the body in response to viral infections. Interferon can be artificially produced and used as a form of immunotherapy.

Interleukin

A naturally produced chemical released by the body.

Source: National Institutes of Health and National Cancer Institute No implicit or explicit endorsement of any company is implied.