Learn about cancer, what it looks like and what causes it.

Castleman disease

Castleman disease is a rare illness that affects your lymph nodes and other immune-cell structures of your body.

Chronic lymphocytic leukemia

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

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

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.

Hodgkin's lymphoma

Hodgkin's lymphoma (Hodgkin's disease) is cancer of the lymphatic system. Many early symptoms of this cancer resemble those of the flu.


Menopause means an end to fertility, but you can stay healthy, vital and sexual.


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.

Non-Hodgkin's lymphoma

Non-Hodgkin's lymphoma is cancer originating in the lymphatic system. It's caused by abnormal white blood cells, and often the only sign is swollen lymph nodes.

Premature ovarian failure

Premature ovarian failure, an uncommon reproductive condition, can lead to infertility and other problems.

Swollen lymph nodes

Swollen lymph nodes usually indicate an infection, particularly in children. However, there are many causes, ranging from the common cold to cancer.


Tuberculosis (TB) is making an alarming comeback. You're especially at risk if you have a weakened immune system.

Valley fever

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.

Apr. 12, 2014