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DAVFs

Dural Arteriovenous Fistulas. Abnormal connections between arteries and a veins the the dural or tough, leather-like covering of the brain and spinal cord.

DAVM

Dural Arteriovenous Malformation. An abnormal connection between an artery and a vein the the dural or tough, leather-like covering of the brain and spinal cord.

DAVMs

Dural Arteriovenous Malformations. Abnormal connections between an artery and a vein the the dural or tough, leather-like covering of the brain and spinal cord.

DDD

Degenerative disc disease or Degenerative disc disorder. Refers to the degeneration of one or more intervertebral discs of the spine.

Demilune

Crescent shape or semicircular line or ravine.

DI

Diabetes insipidus – a condition characterized by excessive urination. The urine is severely dilute and the patient characteristically has excessive thirst. Fluid restriction has no effect on the degree of dilutation in the urine. The most common reason is central DI due to a lack of diuretic hormone (ADH or arginine vasopressin) but DI can also occur due to an insensitivity to ADH in the kidneys (nephrogenic diabetes insipidus or as a result of a drug being administered.

Diadochokinesis

Rapid, alternating muscle movement.  The ability to rapidly alternate between agonistic and antagonistic muscle movements.

Diamox

Trade name for the drug acetazolamide.

DIG

desmoplastic infantile ganglioglioma

DNA

Deoxyribonucleic acid – This is the molecule containing the genetic code used to reproduce and then control function in all known living organisms and many viruses.