- Hematocrit (Hct) – A blood test that measures the number of red blood cells in the bloodstream. The lower the hematocrit, the lower the number of red blood cells in the blood. A person with a low hematocrit may have anemia.
- Hematology – The study of the blood and disorders of the blood.
- Hemoglobin (Hb or Hgb) – The part of the red blood cell that carries oxygen from the lungs to other organs in the body, such as the brain and the heart. A person with a low hemoglobin level may have anemia.
- HER-2/neu (human epidermal growth factor receptor 2) – A protein that is involved A growth and replication of a cell. Some cancers have abnormal HER-2/neu proteins, which are believed to be involved in the unregulated multiplication of cancer cells.
- Histology – The study or examination of tissues or cells under a microscope.
- Hormones – Chemicals secreted by glands. Hormones circulate in the bloodstream and control certain cellular actions.
- Hospice – Coordinated, multidisciplinary patient/family-centered program of supportive care in terminal illness that maintain primary focus on biopsychosocial, cultural, spiritual and environmental quality of life.