The most advanced and fatal stage of an HIV infection.
A substance that produces an allergic reaction in an individual.
A severe response to an allergen in which the symptoms develop quickly, and without help, the patient can die within a few minutes.
A medication that is capable of inhibiting the growth of or killing pathogenic bacterial microorganisms.
A disease-fighting protein created by the immune system in response to the presence of a specific antigen.
An agent that destroys or inhibits the growth of fungi.
Any substance that the body regards as foreign.
The binding of antigens to antibodies.
Any of a large group of diseases characterized by a condition in which the immune system produces antibodies to work against its own tissues, mistaking healthy cells, tissues, or organs for antigens.
Rod-shaped spore-forming bacteria.
A group of one-celled microscopic organisms, some of which are pathogenic.
An infection caused by yeast, a type of fungus.
A malignant tumor that occurs in epithelial tissue.
carcinoma in situ
A malignant tumor in its original position that has not yet disturbed or invaded the surrounding tissues.
A group of proteins that normally circulate in the blood in an inactive form. When needed, these cells complement the ability of antibodies to ward off pathogens by combining with them to dissolve and remove pathogenic bacteria and other foreign cells.
A group of proteins such as interferons and interleukins released primarily by the T cells that act as intracellular signals to begin the immune response.
A group of large herpes-type viruses found in most body fluids and most often causing an infection without signs or symptoms. Can cause a serious illness when the individual has a weakened immune system or when passed from mother to unborn child.
Medication that kills or damages cells.
ductal carcinoma in situ
Breast cancer at its earliest stage, before the cancer has broken through the wall of the milk duct.
Describes the function of destroying worn-out erythrocytes (red blood cells) and releasing their hemoglobin for reuse.
An acute viral infection characterized by painful skin eruptions that follow the underlying route of the inflamed nerve.
A malignancy of the lymphatic system that is distinguished from non-Hodgkin's lymphoma by the presence of large, cancerous lymphocytes.
human immunoideficiency virus
A bloodborne infection in which the virus damages or kills the T cells of the immune system.
A condition that occurs when the immune system is compromised (weakened, not working properly).
Bind with specific antigens in the antigen-antibody response.
A substance that prevents or reduces the body's normal immune response.
A treatment of disease by either stimulating or repressing the immune response.
An infection caused by the Epstein-Barr virus (EBV) that is characterized by fever, a sore throat, and enlarged lymph nodes.
infiltrating ductal carcinoma
Breast cancer that starts in the milk duct, breaks through the wall of that duct, and invades the surrounding fatty breast tissue; also known as invasive ductal carcinoma.
Produced in response to the presence of antigens, particularly viruses or tumor cells. They activate the immune system, fight viruses, and signal other cells to increase their defenses.
Inflammation of the lymph nodes; also known as swollen glands.
Any disease process affecting a lymph node or nodes.
A benign tumor formed by an abnormal collection of lymphatic vessels due to a congenital malformation of the lymphatic system.
Swelling due to an abnormal accumulation of lymph fluid within the tissues.
One of three types of cells that are formed in bone marrow as stem cells that act as specialized antibodies.
A general term applied to malignancies affecting lymphoid tissues.
A diagnostic test to detect damage or malformations of the lymphatic vessels.
A type of leukocyte that surrounds and kills invading cells.
A disease caused by a parasite that lives in certain mosquitoes and is transferred to humans by the bite of an infected mosquito.
A radiographic examination of the breasts to detect the presence of tumors or precancerous cells.
A new cancer site that results from the spreading process; plural, metastases.
The process by which cancer spreads from one place to another.
A benign tumor made up of muscle tissue.
A malignant tumor derived from muscle tissue.
The term used to describe all lymphomas other than Hodgkin's lymphoma.
Caused by a pathogen that normally does not cause illness in healthy humans, but is able to cause an infection in a weakened host.
A hard-tissue sarcoma usually involving the upper shaft of long bones, the pelvis, or the knees.
A plant or an animal that lives on or within another living organism at the expense of that organism.
An acute viral infection transmitted to humans through the bite or saliva of an infected animal.
Small bacteria that live in lice, fleas, ticks, and mites that transmit infection to humans.
A viral infection characterized by a low-grade fever, swollen glands, inflamed eyes, and a fine, pink rash; also known as German measles or 3-day measles.
A malignant tumor that arises from connective tissue; plural, sarcomas or sarcomata.
Long, slender spiral-shaped bacteria that have flexible walls and are capable of movement.
Abnormal enlargement of the spleen.
Group of about 30 species of bacteria that form irregular groups or clusters resembling grapes.
Bacteria that form a chain.
A severe response to an allergen
Radiation therapy administered at a distance from the body.
A parasite that is most commonly transmitted from pets to humans by contact with contaminated animal feces.
A highly contagious disease caused by a herpes virus characterized by a fever and rash; also known as chickenpox.