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Acute coronary syndrome is a term that describes a range of conditions related to sudden, reduced blood flow to the heart. These conditions include a heart attack and unstable angina. A heart attack happens when cell death damages or destroys heart t...
Kidney cross section Kidney cross section The kidneys remove waste and extra fluid from the blood through filtering units called nephrons. Each nephron contains a filter, called a glomerulus. Each filter has tiny blood vessels called capillaries. Whe...
Acute liver failure is loss of liver function that occurs quickly — in days or weeks — usually in a person who has no preexisting liver disease. It's most commonly caused by a hepatitis virus or drugs, such as acetaminophen. Acute liver f...
Acute lymphocytic leukemia (ALL) is a type of cancer of the blood and bone marrow — the spongy tissue inside bones where blood cells are made. The word "acute" in acute lymphocytic leukemia comes from the fact that the disease progresses rapidl...
Acute myelogenous leukemia (AML) is a cancer of the blood and bone marrow — the spongy tissue inside bones where blood cells are made. The word "acute" in acute myelogenous leukemia denotes the disease's rapid progression. It's called myelogeno...
Acute sinusitis causes the spaces inside the nose, known as sinuses, to become inflamed and swollen. Acute sinusitis makes it hard for the sinuses to drain. Mucus builds up. Acute sinusitis can make it hard to breathe through the nose. The area aroun...
Addison's disease, also called adrenal insufficiency, is an uncommon illness that occurs when the body doesn't make enough of certain hormones. In Addison's disease, the adrenal glands make too little cortisol and, often, too little of another hormon...
Adjustment disorders are excessive reactions to stress that involve negative thoughts, strong emotions and changes in behavior. The reaction to a stressful change or event is much more intense than would typically be expected. This can cause a lot of...
Female reproductive system Female reproductive system The ovaries, fallopian tubes, uterus, cervix and vagina (vaginal canal) make up the female reproductive system. Adnexal tumors are growths of cells that form on the organs and connective tissues a...
Adrenal glands Adrenal glands Located on top of each kidney, the adrenal glands make hormones that help regulate metabolism, the immune system, blood pressure and other important functions. Although small, these glands control much of what happens in...
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