Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «D»:
Diverticulum, hypopharyngeal: See: Zenker diverticulum....
Diverticulum, Meckel's: An outpouching of the small bowel. About 1 in every 50 people has a Meckel's diverticulum. It is usually located about 2 feet before the junction of the small bowel with the colon (the large intestine) in the right lower abdomen.
Meckel's diverticulum can become inflamed, ul...
Diverticulum, pharyngoesophageal: See: Zenker diverticulum....
Diverticulum, Zenker: See: Zenker diverticulum....
Diving injury: An injury incurred from diving into water that is too shallow or has hidden hazards. These injuries may be to the head, neck, or spinal cord.
Many diving injuries result when persons --predominantly males aged 15-25 years -- plunge into swimming pools or natural bodies of water such ...
Dizygotic twin: A twins who have shared a
common uterine environment with its twin but is due to a different fertilized ovum.
Dizygotic twins are also called fraternal twins....
Dizziness: Painless head
discomfort with many possible causes including disturbances of
vision, the brain, balance (vestibular) system of the inner
ear, and gastrointestinal system. Dizziness is a medically
indistinct term which laypersons use to describe a variety of
conditions ranging from l...
Dizziness, anxiety as a cause of
Dizziness, anxiety as a cause of: One cause of
dizziness is overbreathing (hyperventilation) due to anxiety. The overbreathing also
causes lightheadedness, a sense of unsteadiness and tingling around the mouth and
fingertips. Relief can be gotten by breathing in and out of a paper bag (to increase ...
Dizziness, pre-syncopal: Dizziness before fainting. Some symptoms of dizziness
such as wooziness, feeling about to black out, and tunnel vision may be pre-syncopal and are due to insufficient blood flow to the brain. These symptoms are typically worse when standing, improve with lying down and may b...
DKK1: A gene that inhibits the activity of osteoblasts, the cells that build bone. DKK1 acts by inhibiting Wnt signaling, which is essential for the growth and development of osteoblasts.
DKK1 is overexpressed in the plasma cells in multiple myeloma. The DKK1 produced by the myeloma cells tips th...
DLI: Donor lymphocyte infusion....
DM: Myotonic dystrophy....
DM1: Type 1 myotonic dystrophy. See: Myotonic dystrophy....
DM2: Myotonic dystrophy type 2. See also: Myotonic dystrophy....
DMD (dystonia musculorum deformans)
DMD dystonia musculorum deformans): Also called torsion dystonia, this is a rare, generalized dystonia (a state of abnormal -- either excessive of inadequate -- muscle tone) that can be inherited, usually begins in childhood, and becomes progressively worse. It can leave individuals seriously disabl...