Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «D»:
Differentiated cancer: A cancer in which the cells are mature and look like cells in the tissue from it arose. Differentiated cancers tend to be decidedly less aggressive than undifferentiated cancers composed of immature cells....
Differentiation: 1 The process by which cells become progressively more specialized; a normal process through which cells mature. This process of specialization for the cell comes at the expense of its breadth of potential. Stem cells can, for example, differentiate into secretory cells in the inte...
Differentiation therapy: An approach to the treatment of advanced or aggressive malignancies in which the malignant cells are treated so that they can resume the process of maturation and differentiation into mature cells.
Differentiation therapy is based on the concept that cancer cells are norm...
Difficult urination: See: Dysuria....
Diffuse cutaneous mastocytosis
Diffuse cutaneous mastocytosis: See: Diffuse mastocytosis....
Diffuse degeneration of gray matter with cirrhosis
Diffuse degeneration of cerebral gray matter with hepatic cirrhosis, Alpers: A progressive disease of the nervous system characterized by spasticity (tightness), myoclonus and dementia and by liver problems with jaundice and cirrhosis. This disorder, first described by Alpers in 1931 as "Diffuse pro...
Diffuse idiopathic skeletal hyperostosis
Diffuse idiopathic skeletal hyperostosis: Abbreviated as DISH. Diffuse idiopathic skeletal hyperostosis is a
form of degenerative arthritis characteristically associated with
flowing calcification along the sides of the vertebrae of the spine and commonly associated with inflammation (tendinitis) a...
Diffuse mastocytosis: A form of mastocytosis in which the entire skin is thickened and leathery with generalized reddening and intense pruritus (itching) due to widespread infiltration of the skin with mast cells.
Treatment may include antihistamines, drugs to reduce stomach acid, migraine
Diffuse toxic goiter
Diffuse toxic goiter: Graves disease, the most common cause of hyperthyroidism (overactivity of the thyroid gland), with generalized diffuse overactivity ("toxicity") of the entire thyroid gland which becomes enlarged into a goiter.
There are three clinical components to Graves disease:
DiGeorge syndrome: A genetic disorder characterized by hypocalcemia, immunodeficiency, and congenital heart disease:
Hypocalcemia (low calcium levels in the blood) due to hypoplasia (underdevelopment) of the parathyroid glands that are needed to control calcium;
Immunodeficiency due to hypoplasia ...
Digestive a Kidney Dis, Nat'l Inst Diabetes and
Digestive and Kidney Diseases, National Institute of Diabetes and (NIDDK): One
of the National Institutes of Health in the U.S., the
NIDDK has a multisystem name and a comparably broad mission,
namely, to "conduct and support basic and
applied research and provide leadership for a national
Digestive system: The organs that are responsible for getting food into and out of the body and for making use of it. These organs include the salivary glands, the mouth, esophagus, stomach, small intestine, liver, gallbladder, pancreas, colon, rectum, and anus.
The digestive system has a series of...
Digit: A finger or toe....
Digit, supernumerary: An extra finger or toe....
Digital rectal exam
Digital rectal exam (DRE): An exam to detect
abnormalities that can be felt (palpated) from within the rectum. The
doctor inserts a lubricated, gloved finger into the rectum and feels
for anything that is not normal.
The digital rectal exam is an important screening test for the
detection of t...