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Myasthenia Gravis
Myasthenia gravis is an autoimmune disorder that affects communication between nerves and voluntary muscles. The immune system interferes with signals that tell…
Mycosis Fungoides
Mycosis fungoides is a rare cancer of T lymphocytes, a type of white blood cell that helps the immune system. It commonly…
Myelitis
Myelitis is inflammation of the spinal cord, the bundle of nerves that carries messages between the brain and body. This inflammation can…
Myelodysplastic Syndromes
Myelodysplastic syndromes (MDS) are a group of blood cancers that begin in the bone marrow, where blood cells are made. Abnormal marrow…
Myelofibrosis
Myelofibrosis is a rare, chronic blood cancer in which scar tissue builds up in the bone marrow. The scarring disrupts normal blood-cell…
Myelogenous Leukemia
Myelogenous leukemia is a cancer of blood-forming tissue, especially the bone marrow, where many blood cells are made. In chronic myelogenous leukemia,…
Myocarditis
Myocarditis is inflammation of the heart muscle. This inflammation can make it harder for the heart to pump blood and may affect…
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.…
