Diseases & conditions A-Z List
Diseases & Conditions A-Z List - «N»:
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Neurofibromatosis-1
Neurofibromatosis-1 is an inherited disorder in which nerve tissue tumors (neurofibromas) form in the skin, bottom layer of skin (subcutaneous tissue), and nerves from the brain (cranial nerves) and spinal cord (spinal root nerves).
Causes
NF1 is an inherited disease. If either parent has NF1, each...
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Neurogenic bladder
Neurogenic bladder is a urinary problem in which the bladder does not empty properly due to a neurological condition.
See also: Urinary incontinence
Causes
Several muscles and nerves must work together for your bladder to hold urine until you're ready to empty it. Nerve messages go back and forth ...
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Neurologic deficit
A neurologic deficit is a functional abnormality of a body area due to a decrease in the function of the brain, spinal cord, muscles, or nerves.
Examples include inability to speak, decreased sensation, loss of balance, weakness, mental function problems, visual changes, abnormal reflexes, and walki...
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Neuronal ceroid lipofuscinoses (NCLS)
Neuronal ceroid lipofuscinoses (NCLS) refers to a group of rare, inherited disorders of the nerve cells.
There are three main types of NCLS:
Adult (Kufs' or Parry's disease)
Juvenile (Batten disease)
Late infantile (Jansky-Bielschowsky)
Causes
NCLS is a type of neurodegenerative disorder. It invo...
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Neuropathy secondary to drugs
Neuropathy secondary to drugs is a loss of sensation (or movement) in a part of the body due to a certain medicine.
Causes
The damage is caused by toxic effects of certain medications on the peripheral nerves (the nerves not in the brain or spinal cord). There is usually evidence of damage to the a...
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Neuroretinitis
Neuroretinitis is inflammation of the retina and optic nerve of the eye. Various bacteria and viruses can lead to neuroretinitis. Inflammation can occur in the absence of any infection.
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Neurosarcoidosis
Neurosarcoidosis is a complication of sarcoidosis in which inflammation and abnormal deposits occur in the brain, spinal cord, and other areas of the nervous system.
Causes
Sarcoidosis is a long-term (chronic) disorder that affects many parts of the body, mostly the lungs. In a small number of pati...
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Neurosciences
Neurosciences refers to the branch of medicine that focuses on the nervous system. The nervous system is made of two parts:
The central nervous system consists of your brain and spinal cord.
The peripheral nervous system consists of all your nerves outside of the brain and spinal cord including, in...
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Neurosyphilis
Neurosyphilis is an infection of the brain or spinal cord. It occurs in persons with untreated syphilis many years after they are first infected.
Causes
Neurosyphilis is caused by Treponema pallidum, the bacteria that cause syphillis. It occurs about 10 - 20 years after a person is first infected w...
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Neutropenia - infants
Neutropenia is an abnormally low number of white blood cells called neutrophils. Neutrophils help the body fight infection. This article discusses neutropenia in infants.
Causes
Neutrophils are produced in the bone marrow and released into the bloodstream to travel to wherever they are needed. Low ...
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Newborn head molding
Newborn head molding is an abnormal head shape that results from pressure on the baby's head during childbirth.
Information
The bones of a newborn baby's skull are soft and flexible, with gaps between the plates of bone.
The spaces between the bony plates of the skull are called cranial sutures. Th...
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Newborn jaundice
Newborn jaundice is a condition marked by high levels of bilirubin in the blood. The increased bilirubin cause the infant's skin and whites of the eyes (sclera) to look yellow.
Causes
Bilirubin is a yellow pigment that's created in the body during the normal recycling of old red blood cells. The li...
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Newborn jaundice - discharge
Your baby has newborn jaundice. This common condition is caused by high levels of bilirubin in the blood. Your child’s skin and sclera (whites of their eyes) will look yellow.
Some newborns need to be treated before they leave the hospital. Others may need to go back to the hospital when they...
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Newborn jaundice - what to ask your doctor
Newborn jaundice is a common condition. It is caused by high levels of bilirubin (a yellow coloring) in your child's blood. This can make your child's skin and sclera (the whites of their eyes) look yellow. Your child may go home with some jaundice or may develop jaundice after going home.
Below are...
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Newborn screening tests
Newborn screening tests look for serious developmental, genetic, and metabolic disorders so that important action can be taken during the critical time before symptoms develop. Most of these illnesses are very rare.
In the United States, individual states regulate newborn screening, so the diseases ...
