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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «L»:

  1. Lymphatic filariasis Lymphatic filariasis
    Lymphatic filariasis: A parasitic disease caused by the African eye worm, a microscopic thread-like worm. The adult worms can only live in the human lymph system. Lymphatic filariasis affects over 120 million people in the tropics and sub-tropics of Asia, Africa, Western Pacific, and parts of Cen...
  2. Lymphatic system Lymphatic system
    Lymphatic system: The tissues and organs, including the bone marrow, spleen, thymus, and lymph nodes, that produce and store cells that fight infection and disease. The channels that carry lymph are also part of this system. ...
  3. Lymphatic tissue Lymphatic tissue
    Lymphatic tissue: A part of the body's immune system that helps protect it from bacteria and other foreign entities. Lymphatic tissue is rich in lymphocytes (and accessory cells such as macrophages and reticular cells). The lymphatic tissue includes the lymph nodes, spleen, tonsils, adenoids and the...
  4. Lymphatics Lymphatics
    Lymphatics: Small thin channels similar to blood vessels that do not carry blood, but collect and carry tissue fluid (called lymph) from the body to ultimately drain back into the blood stream....
  5. Lymphedema Lymphedema
    Lymphedema: A common chronic, debilitating condition in which excess fluid called lymph collects in tissues and causes swelling (edema) in them. Lymphedema (edema due to lymphatic fluid) may occur in the arms or legs. This often happens after lymph vessels or lymph nodes in the axilla (armpit) or...
  6. Lymphedema, congenital Lymphedema, congenital
    Lymphedema, congenital: See: Congenital lymphedema....
  7. Lymphoblastic leukemia, acute (ALL) Lymphoblastic leukemia, acute (ALL)
    Lymphoblastic leukemia, acute (ALL): A form of leukemia that has a sudden onset and is characterized by the presence in the blood and bone marrow of large numbers of unusually immature white blood cells destined to become lymphocytes. These cells, called lymphoblasts, are rarely seen in the blood un...
  8. Lymphocyte Lymphocyte
    Lymphocytes: A small white blood cell (leukocyte) that plays a large role in defending the body against disease. Lymphocytes are responsible for immune responses. There are two main types of lymphocytes: B cells and T cells. The B cells make antibodies that attack bacteria and toxins while the T c...
  9. Lymphocytic Lymphocytic
    Lymphocytic: Referring to lymphocytes, a type of white blood cell. ...
  10. Lymphocytic colitis Lymphocytic colitis
    Lymphocytic colitis: A type of inflammatory disease of the large intestine (colon). The name derives from the microscopic observations of biopsies of the colon. What is seen in the microscope view of colon tissue is an increased number of inflammatory white blood cells (lymphocytes) among the l...
  11. Lymphocytic leukemia, acute (ALL) Lymphocytic leukemia, acute (ALL)
    Lymphocytic leukemia, acute (ALL): A rapidly progressing form of leukemia in which there are too many very young (immature) white blood cells called lymphoblasts in the bloodstream and bone marrow. ALL is spoken not as the word "all", but as the three letters: A.L.L. Acute lymphocytic leukemia is al...
  12. Lymphocytosis Lymphocytosis
    Lymphocytosis: Too many lymphocytes, a finding that may be a marker for infection or disease. ...
  13. Lymphogranuloma venereum Lymphogranuloma venereum
    Lymphogranuloma venereum: Abbreviated LGV. An uncommon genital or anorectal (affecting the anus and/or rectum) infection that is caused by a specific type of Chlamydia trachomatis. Patients typically have tender glands (lymph nodes) in the groin and may recently have had a genital ulcer that resol...
  14. Lymphoid Lymphoid
    Lymphoid: Referring to lymphocytes, a type of white blood cell. Also refers to tissue in which lymphocytes develop. ...
  15. Lymphoid tissue Lymphoid tissue
    Lymphoid tissue: A part of the body's immune system that helps protect it from bacteria and other foreign entities. Lymphoid tissue is rich in lymphocytes (and accessory cells such as macrophages and reticular cells). The lymphoid tissue includes the lymph nodes, spleen, tonsils and adenoids and...