This is a range of conditions that cause sudden low blood flow to the heart. An example is a heart attack. Know the symptoms, causes and treatment.
Disease
Acute flaccid myelitis (AFM)
Know the possible symptoms of acute flaccid myelitis (AFM), a rare but serious condition that affects young children.
Disease
Acute kidney injury
Learn what happens when the kidneys suddenly stop working, what causes this condition and how it's treated.
Disease
Acute liver failure
A rapid loss of liver function can happen in people who don't even have liver disease. Find out about symptoms, treatment and prevention of this serious medical emergency.
Disease
Acute lymphocytic leukemia
Learn about this cancer that forms in the blood and bone marrow. Treatments include medications and bone marrow transplant.
Disease
Acute myelogenous leukemia
Learn about this cancer that forms in the blood and bone marrow. Treatments include medicines and bone marrow transplant, also called stem cell transplant.
Disease
Acute sinusitis
Learn the latest ways to treat and prevent the stuffy nose and head pain that can come with this condition.
Disease
Addison's disease
Learn about this rare but serious condition of the adrenal glands that's treated by replacing hormones the body needs.
Disease
Adenomyosis
Displaced endometrial tissue from adenomyosis can cause an enlarged uterus and painful, heavy periods.
Disease
Adjustment disorders
These are unhealthy reactions to stress that involve emotions and behavior. The response to stress is much more intense than would usually be expected.
Disease
Adnexal tumors and masses
Learn about symptoms, diagnosis and treatment of these growths that occur in and around the ovaries and fallopian tubes.
Disease
Adrenal cancer
Learn about this rare cancer that begins in the adrenal glands. Find out about symptoms, diagnosis and treatment.