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Nasal Polyps
Nasal polyps are soft, teardrop-shaped growths that develop in the lining of the nose or sinuses. They are usually noncancerous and are…
Nasopharyngeal Cancer
Nasopharyngeal cancer is a cancer that starts in the nasopharynx, the upper part of the throat located behind the nose and above…
Nausea
Nausea is an uncomfortable, queasy feeling in the stomach or upper abdomen that may create an urge to vomit. The nausea meaning…
Neck Cancer
Neck cancer is a broad term for a group of cancers that can begin in different tissues of the head and neck,…
Neck Pain
Neck pain is discomfort, tightness, stiffness, or reduced movement in the cervical region, which is the part of the spine between the…
Necrotising Fasciitis
Necrotising fasciitis is a rare, serious bacterial infection that affects the deeper soft tissues of the body. It can destroy skin, fat…
Necrotizing Ulcerative Gingivitis
Necrotizing ulcerative gingivitis is a painful infection that damages the gum tissue around the teeth. It is also called acute necrotizing ulcerative…
Neonatal Lupus
Neonatal lupus is a temporary antibody-related condition that can affect some babies during pregnancy or after birth. Maternal anti-Ro/SSA or anti-La/SSB antibodies…
Neonatal Patent Ductus Arteriosus
Neonatal patent ductus arteriosus is a condition in which the ductus arteriosus, a normal fetal blood vessel between the pulmonary artery and…
Nephrology
Diagnosis and treatment for kidney diseases, including chronic kidney disease, kidney stones, and dialysis care.
Nephrotic Syndrome
Nephrotic syndrome is a group of symptoms caused by damage to the kidneys' tiny filtering units. These damaged filters allow too much…
Nephrotoxicity
Nephrotoxicity is kidney damage caused by a medicine, chemical, or other toxic substance. Common triggers include some antibiotics, nonsteroidal anti-inflammatory drugs (NSAIDs),…
Neuroendocrine Tumor
A neuroendocrine tumor (NET) is a growth that begins in neuroendocrine cells. These cells receive signals from the nervous system and make…
Neurology
Diagnosis and treatment for disorders of the brain, spinal cord, and nerves.
Neurosurgery
Surgical treatment for conditions affecting the brain, spinal cord, nerves, and pituitary gland.
Neutrophils Blood Test
A neutrophils blood test measures neutrophils, a type of white blood cell that helps the body respond to infection and inflammation. It…
Nicotine Dependence
Nicotine dependence is a treatable health condition in which the brain and body become accustomed to nicotine and continue to seek it.…
Night Sweats
Night sweats are episodes of sweating during sleep that may soak your sleepwear or bedding. They are different from feeling warm or…
Nocardiosis
Nocardiosis is an uncommon bacterial infection caused by bacteria called Nocardia. The bacteria can enter the body when a person breathes in…
Non-Small Cell Lung Cancer
Non-small cell lung cancer (NSCLC) is a group of cancers that begin in the lungs. It is the most common broad category…
Nuclear Medicine
Diagnostic imaging and targeted treatment using small, carefully controlled amounts of radioactive material.
Numbness In Hands
Numbness in hands means reduced or changed sensation in all or part of one or both hands. It may feel like tingling…
Nutritional Deficiency After Surgery
Nutritional deficiency after surgery occurs when the body does not receive, absorb, or use enough nutrients to support healing and normal function.…
Nutritional Disorders
Nutritional disorders occur when the body receives too little, too much, or an improper balance of calories or nutrients. They can affect…
