Glossary

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Term Definition
Macular stain (Stork bite or Angel kiss)

A small birthmark that is a small, mild, red blemish on the skin. When found in the nose or forehead often called 'Angel Kisses' and on the back of the neck 'Stork Bites.' Usually disappears by age two, though 'Stork Bites' may persist into adulthood.

Malnutrition

Condition that occurs when your body does not get enough nutrients either because of a poor diet or a condition in which the body is unable to absorb or utilize nutrients.

Manometry testing

Medical test used to measure the pressure inside the lower part of the esophagus.

McCune-Albright Syndrome

Genetic disease that affects the bones and color (pigmentation) of the skin.

Meniere's disease

Disease of the ear that can cause severe dizziness, a roaring sound in your ears called tinnitus, hearing loss that comes and goes and the feeling of ear pressure or pain. It usually affects just one ear.

Meningitis

Serious disease caused by the inflammation of the protective membranes covering the brain and spinal cord known as the meninges.

Migraine

A severe, painful headache that is often preceded or accompanied by sensory warning signs such as flashes of light, blind spots, tingling in the arms and legs, nausea, vomiting, and increased sensitivity to light and sound. The excruciating pain that migr

Mitral valve regurgitation

Heart condition in which the mitral valve doesn't close tightly, allowing blood to flow backward in the heart. When this happens, blood can't move through the heart or to the rest of the body as efficiently, making a person feel tired or out of breath.

Mongolian spot

Flat birthmarks that can be deep brown, slate gray, or blue-black in color and sometimes look similar to bruises. The edges are often, but not always, indistinct. They are most common on the lower back and buttocks, but are often found on the legs, back,

Moyamoya Disease

A neurovascular disease in which certain arteries in the brain are constricted, blocking blood flow and leading to stroke.

MRI (magnetic resonance imaging)

Radiology technique that uses magnetism, radio waves, and a computer to produce images of body structures

Myelodysplastic Syndrome

A group of conditions that occur when the blood-forming cells in the bone marrow are damaged, leading to low numbers of one or more type of blood cells.

Myelofibrosis

Rare cancer of the bone marrow in which the marrow is replaced by scar tissue and is not able to make healthy blood cells.

Myocarditis

An inflammation of the myocardium, the middle layer of the heart wall, usually caused by a viral infection. Signs and symptoms of myocarditis include chest pain, heart failure, and abnormal heart rhythms.