NPH

Normal pressure hydrocephalus.

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NREM sleep
NREM (non-rapid eye movement) sleep is dreamless sleep. During NREM, the brain waves on the electroencephalographic (EEG) recording are typically slow and of high voltage, the breathing and heart rate are slow and regular, the blood pressure is low, and the sleeper is relatively still. NREM sleep is divided into 4 stages of increasing depth […]
NSAID
Relafen). People who take certain NSAIDs may have a higher risk of having a heart attack or a stroke than people who do not take these medications. This risk may be higher for people who take NSAIDs for a long time. Other major side effects of NSAIDs are gastrointestinal problems. Some 10 to 50 percent […]
NSE (neuron-specific enolase)
neuroblastoma, small cell lung cancer, medullary thyroid cancer, carcinoid tumors, endocrine tumors of the pancreas, and melanoma. Studies of NSE as a tumor marker have concentrated primarily on patients with neuroblastoma and small cell lung cancer. Measurement of NSE levels in patients with these two diseases can provide information about the extent of the disease […]

Nuchal
Referring to the back of the neck (nape). For example, nuchal rigidity is a stiff neck, sometimes a symptom of meningitis.
Nuchal translucency test
A measurement of the size of the translucent space behind the neck of the fetus using ultrasound at between 10 and 14 weeks of pregnancy, reflecting the amount of fluid that has accumulated under the skin of the fetus. Nuchal translucency tends to be increased in chromosome disorders such as Turner syndrome and Down syndrome. […]