National Institute of Diabetes
and Digestive and Kidney Diseases (NIDDK)
One of the 17 institutes that make up the National Institutes of Health,
an agency of the Public Health Service.
Necrobiosis Lipoidica Diabeticorum
A skin condition usually on the lower part of the legs. The lesions can
be small or extend over a large area. They are usually raised, yellow, and
waxy in appearance and often have a purple border. Young women are most
often affected. This condition occurs in people with diabetes, or it may be
a sign of diabetes. It also occurs in people who do not have diabetes.
Neovascularization
The term used when new, tiny blood vessels grow in a new place, for
example, out from the retina.
See also: Diabetic
retinopathy.
Nephrologist
A doctor who sees and treats people with kidney diseases.
Nephropathy
Any disease of the kidneys.
Kidney damage caused by diabetes, called diabetic nephropathy, can
occur in several ways. The typical form of diabetic nephropathy, called
diabetic glomerulosclerosis, has large amounts of urine protein, hypertension,
and is slowly progressive. It usually doesn't occur until after many years
of diabetes, and can be delayed by tight control of the blood sugar. Usually
the best lab test for early detection of diabetic nephropathy is measurement
of microalbumin
in the urine.
Nerve Conduction Velocity (NCV) Studies and
Electromyography (EMG)
Tests used to diagnose neuropathy and check for nerve damage. These
tests are usually both run at the same time, using the same equipment.
Nesidioblastosis
A group of rare conditions occurring in infancy in which excessively
large amounts of insulin are secreted by the beta cells
in relation to the prevailing blood sugar level. Sometimes the condition
occurs later in life, and sometimes it is due to an autosomal recessive
genetic defect.
Also called Persistent Hyperinsulinemic Hypoglycemia of Infancy (PHHI).
Neurologist
A doctor who sees and treats people with problems of the nervous system.
Neuropathy
Disease of the nervous system. Many people who have had diabetes for a
while have nerve damage. The three major forms of nerve damage are:
peripheral neuropathy, autonomic neuropathy, and mononeuropathy. The most
common form is peripheral neuropathy, which mainly affects the feet and
legs.
See also: Peripheral
neuropathy; autonomic
neuropathy; mononeuropathy.
NIDDM (Noninsulin-dependent diabetes mellitus)
See: Type 2
diabetes mellitus.
NOD Mouse
A strain of mice in which the female has an especially high incidence of
a diabetes similar to Type 1 in humans. Much used as a research model for
prevention and new onset treatment.
Noninsulin-Dependent
Diabetes Mellitus (NIDDM)
See: Type 2
Diabetes Mellitus.
Noninvasive Blood Glucose Monitoring
A way to measure blood
glucose without having to prick the finger to obtain a blood sample.
Several noninvasive
devices are currently being developed.
Nonketotic Coma (Hyperglycemic
hyperosmolar nonketotic syndrome, Hyperglycemic hyperosmolar nonketotic
coma)
A complication of diabetes caused by a lack of insulin and dehydration.
It is diagnosed when the patient has:
- very high levels of glucose (sugar) in the blood;
- absence of ketoacidosis;
- severe dehydration;
- a sleepy, confused, or comatose state.
Nonketotic coma is more likely to be associated with Type
2 diabetes, and is sometimes the initial presenting situation for Type 2
diabetes. Nonketotic coma is uncommon in Type
1 Diabetes.
NPH Insulin
A type of insulin that
is intermediate-acting.
Nutrition
The process by which the body draws nutrients from food and uses them to
make or mend its cells.
Nutritionist
See: Dietitian.