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| H-RAS GENE | A gene that may cause cancer when it is mutated (changed). The H-ras gene makes the HRAS protein, which is involved in cell signaling pathways, cell growth, and apoptosis (cell death). Agents that block the actions of the mutated H-ras gene or its protein in cancer cells may stop the growth of cancer. Also called Hras gene. | |||
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| H. PYLORI | Helicobacter pylori. Bacteria that cause inflammation and ulcers in the stomach. | |||
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| HAART | Highly active antiretroviral therapy. Treatment for human immunodeficiency virus (HIV) infection that uses a combination of several antiretroviral drugs. The drugs inhibit the ability of the virus to multiply in the body, and they slow down the development of AIDS. | |||
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| HAIR FOLLICLE | A shaft or opening on the surface of the skin through which hair grows. | |||
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| HAIRY CELL LEUKEMIA | A rare type of leukemia in which abnormal B-lymphocytes (a type of white blood cell) are present in the bone marrow, spleen, and peripheral blood. When viewed under a microscope, these cells appear to be covered with tiny hair-like projections. | |||
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| HALDOL | A drug used to treat certain mental and neurological disorders. It is also being studied in the treatment of nausea and vomiting caused by some cancer treatments. It is a type of antiemetic and a type of antipsychotic. Also called haloperidol. | |||
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| HALF-SIBLING | A person¿s brother or sister who has one parent in common. | |||
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| HALF-SIBLING | A person's brother or sister who has one parent in common. | |||
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| HALLUCINATION | A sight, sound, smell, taste, or touch that a person believes to be real but is not real. Hallucinations can be caused by nervous system disease, certain drugs, or mental disorders. | |||
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| HALOFUGINONE HYDROBROMIDE | A substance that is being studied for its ability to slow the growth of connective tissue and prevent the growth of new blood vessels to a solid tumor. It belongs to the family of drugs called quinazolinone alkaloids. | |||
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