Learn about cancer, what it looks like and what causes it.
Chronic lymphocytic leukemia is a cancer of the blood and bone marrow. Unlike other cancers, this form of leukemia doesn't always initially require treatment.
Chronic myelogenous leukemia (CML) is a rare type of blood cancer. New treatments may be improving the prognosis for many people with CML.
Churg-Strauss syndrome is a rare disorder marked by blood vessel inflammation that affects organs throughout the body. Asthma is the most common sign.
More than 39 million people are living with HIV — the virus that causes AIDS. Millions more are likely to become infected in the next decade.
Mononucleosis — also called kissing disease because it can be spread by kissing — causes fatigue, fever and swollen lymph glands.
In myelofibrosis, healthy bone marrow is replaced with scar tissue, leading to severe anemia and fatigue.
Premature ovarian failure, an uncommon reproductive condition, can lead to infertility and other problems.
Swollen lymph nodes usually indicate an infection, particularly in children. However, there are many causes, ranging from the common cold to cancer.
Valley fever — This common fungal infection in America's desert regions causes few, if any, problems for most people, but for some it can be life-threatening.
April 12, 2014
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