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naevus

A type of skin blemish.

NAI

non-accidental injury

narcolepsy

A sleep disorder in which there are episodes of temporary cessation of breathing (lasting 10 seconds or longer) during sleep

narcolepsy

A sleep disorder characterised by chronic daytime sleepiness with recurrent episodes of sleep occuring throughout the day.

nasal

Relating to the nose

nasal polyp

A growth in the lining of the nose.

nasal septum

The partition that divides the nose cavity into two nostrils

nasogastric tube

A tube passed through the nose into the stomach.

nasopharynx

The passage connecting the nasal cavity behind the nose to the top of the throat.

NDE

Near-death experience.

near-death experience

A set of perceptions often experienced by those near to death, or who have died clinically and are subsequently revived. Frequent features are a sense of detachment from the body, sometimes levitating out of it, seeing a tunnel of light and usually feelings of serenity (but occasionally terror).

neauraminidase inhibitors

A class of antiviral drugs that act against the influenza virus.

necrosis

Death of cells or tissue in the body due to disease, injury or impaired blood supply.

neglect

Lack of attention or disregard; a condition in which one side of the body or visual field are neglected.

neonatal

Relating to the newborn baby.

neonate

A newborn baby.

neoplasia

An abnormal proliferation of cells

neoplastic disease

Any malignant growth.

neovascularisation

The formation of new, abnormally fragile blood vessels.

nephrectomy

The surgical removal of a kidney.

nephritis

Inflammation of the kidney.

nephrogenic diabetes insipidus

A medical condition in which the kidney is unable to conserve water.

nephrologist

A specialist in diseases of the kidney.

nephropathy

A disease of the kidney.