Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «L»:
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...
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. ...
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...
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....
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...
Lymphedema, congenital: See: Congenital lymphedema....
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...
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...
Lymphocytic: Referring to lymphocytes, a type of white blood
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...
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...
Lymphocytosis: Too many lymphocytes, a finding that
may be a marker for infection or disease. ...
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...
Lymphoid: Referring to lymphocytes, a type of white blood cell.
Also refers to tissue in which lymphocytes develop. ...
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...