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Diseases & conditions A-Z List

Diseases & Conditions A-Z List - «N»:

  1. Neonatal cystic fibrosis screening Neonatal cystic fibrosis screening
    Neonatal cystic fibrosis screening is a blood test that looks for increased levels of immunoreactive trypsinogen (IRT), an enzyme produced by the pancreas. The test is performed on newborns to screen for cystic fibrosis (CF). Cystic fibrosis is an inherited disease that causes thick, sticky mucus to...
  2. Neonatal hypoglycemia Neonatal hypoglycemia
    Neonatal hypoglycemia is low blood sugar (glucose) in the first few days after birth. Causes Babies need sugar (glucose) for energy. Most of that glucose is used by the brain. The developing baby gets glucose from the mother through the placenta. After birth, the baby gets glucose by producing it i...
  3. Neonatal hypothyroidism Neonatal hypothyroidism
    Neonatal hypothyroidism is decreased thyroid hormone production in a newborn. In very rare cases, no thyroid hormone is produced. If the baby was born with the condition, it is called congenital hypothyroidism. If it develops soon after birth, it is referred to as hypothyroidism acquired in the newb...
  4. Neonatal respiratory distress syndrome Neonatal respiratory distress syndrome
    Neonatal respiratory distress syndrome (RDS) is most commonly a complication seen in premature infants. The condition makes it difficult to breathe. Causes Neonatal RDS occurs in infants whose lungs have not yet fully developed. The disease is mainly caused by a lack of a slippery, protective subst...
  5. Neonatal sepsis Neonatal sepsis
    Neonatal sepsis is a blood infection that occurs in an infant younger than 90 days old. Early-onset sepsis is seen in the first week of life. Late-onset sepsis occurs between days 8 and 89. Causes A number of different bacteria, including Escherichia coli (E.coli), Listeria, and certain strains of ...
  6. Neonatal weight gain and nutrition Neonatal weight gain and nutrition
    Feeding and growing is one of the most important tasks of small babies in the hospital. It is important that premature babies receive the right nutrition so they reach a weight similar to that they would have gained if they were still inside the womb. Information Babies born less than 37 weeks in t...
  7. Neonate Neonate
    A neonate is a baby who is 4 weeks old or younger. Information A neonate is also called a newborn. The neonatal period -- the first 4 weeks of a child's life -- represents a time when changes are very rapid, and many critical events can occur. During the first 30 days, most present from birth (cong...
  8. Nephrocalcinosis Nephrocalcinosis
    Nephrocalcinosis is a disorder in which there is excess calcium deposited in the kidneys. Causes Any disorder that leads to high levels of calcium in the blood or urine may lead to nephrocalcinosis. In nephrocalcinosis, calcium deposits form in the kidney tissue itself. Most of the time, both kidne...
  9. Nephrotic syndrome Nephrotic syndrome
    Nephrotic syndrome is a group of symptoms including protein in the urine (more than 3.5 grams per day), low blood protein levels, high cholesterol levels, high triglyceride levels, and swelling. Causes Nephrotic syndrome is caused by various disorders that damage the kidneys, particularly the basem...
  10. Nerve biopsy Nerve biopsy
    A nerve biopsy is the removal of a small piece of a nerve for examination. How the Test is Performed The sural nerve (in the ankle), or the superficial radial nerve (wrist) are the sites most often used for biopsy. A local anesthetic is used to numb the area. A small incision is made, and a portion...
  11. Nerve conduction velocity Nerve conduction velocity
    Nerve conduction velocity (NCV) is a test of the speed of electrical signals through a nerve. How the Test is Performed Patches called surface electrodes, similar to those used for ECG, are placed on the skin over nerves at various locations. Each patch gives off a very mild electrical impulse, whi...
  12. Neuralgia Neuralgia
    Neuralgia is pain that follows the path of a nerve. See also: Trigeminal neuralgia Causes Causes of neuralgia include: Certain drugs Chemical irritation Chronic renal insufficiency Diabetes Infections, such as shingles, syphilis, and Lyme disease Porphyria Pressure on nerves by nearby stru...
  13. Neuroblastoma Neuroblastoma
    Neuroblastoma is a malignant (cancerous) tumor that develops from nerve tissue. It occurs in infants and children. Causes Neuroblastoma can occur in many areas of the body. It develops from the tissues that form the sympathetic nervous system (the part of the nervous system that controls body funct...
  14. Neurocognitive testing Neurocognitive testing
    Neurocognitive testing is used to find out about a person's thinking abilities, and to determine whether these problems are improving or getting worse. How the Test is Performed A nurse, physician, physician assistant, or mental health worker will ask a number of questions. The test can be performe...
  15. Neurofibromatosis 2 Neurofibromatosis 2
    Neurofibromatosis 2 (NF2) is a genetic disorder in which tumors form on the nerves of the brain and spine (the central nervous system). See also: Neurofibromatosis 1 (NF1) Causes NF2 is passed down through families in an autosomal dominant fashion. This means that if one parent has NF2, any child o...