Glossary Terms
cancer (KAN-ser)
A term for
diseases in which abnormal cells divide without control and
can invade nearby tissues. Cancer cells can also spread to
other parts of the body through the blood and lymph
systems. There are several main types of cancer. Carcinoma
is cancer that begins in the skin or in tissues that line
or cover internal organs. Sarcoma is cancer that begins in
bone, cartilage, fat, muscle, blood vessels, or other
connective or supportive tissue. Leukemia is cancer that
starts in blood-forming tissue such as the bone marrow, and
causes large numbers of abnormal blood cells to be produced
and enter the blood. Lymphoma and multiple myeloma are
cancers that begin in the cells of the immune system.
Central nervous system cancers are cancers that begin in
the tissues of the brain and spinal cord.
PDQ
PDQ is an online database developed and maintained by the National Cancer Institute. Designed to make the most current, credible, and accurate cancer information available to health professionals and the public, PDQ contains peer-reviewed summaries on cancer treatment, screening, prevention, genetics, complementary and alternative medicine, and supportive care; a registry of cancer clinical trials from around the world; and directories of physicians, professionals who provide genetics services, and organizations that provide cancer care. Most of this information, and more specific information about PDQ, can be found on the NCI's Web site at http://www.cancer.gov/cancertopics/pdq. Also called Physician Data Query.
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