Magnetic resonance angiography or MRA is a type of imaging test that allows a healthcare provider to look at the body's blood vessels.

Magnetic resonance imaging (MRI) uses a large magnet, radiofrequencies, and a computer to make detailed pictures of organs and structures within the body. It is used to diagnose health problems.

Magnetic resonance imaging (MRI) is a test that uses a large magnet, radio signals, and a computer to make images of organs and tissue in the body. In this case, the heart is imaged. MRI may be used instead of a CT scan when organs or ...

Magnetic resonance imaging (MRI) uses a large magnet, radiofrequencies, and a computer to produce detailed images of organs and structures within the body, in this case, the brain and spine. MRI is used to help diagnose a health problem.

Magnetic resonance imaging (MRI) uses a magnetic field and radio waves to create cross-sectional images of your head and body. Your doctor uses these detailed, clear images to identify and diagnose many conditions. It is particularly ...

Depression is a serious mood disorder. It touches every part of your life and is caused by a chemical imbalance in your brain. Treatment involves medicine and counseling.

Major depression goes beyond the day's normal ups and downs. It involves a teen's body, mood, and thoughts. It can affect and disrupt eating, sleeping, or thinking patterns.

Malaria is caused by a parasite. It is passed to humans by the bite of an infected Anopheles mosquito.

Breast cancer happens when certain cells in the breast become cancerous and form a tumor. Men can have the same types of breast cancer as women. Seventy percent of male breast cancers are a type called ductal carcinoma. Breast cancer in ...

Male infertility means that a man has a problem with his reproductive system. It means he can't start a pregnancy with a female partner. Read on to learn about causes, diagnosis, and treatment.

The mesothelium is a tissue that covers and protects the outer surface of some organs. Malignant mesothelioma is a rare kind of cancer that starts in the mesothelium. Learn more about symptoms, diagnosis, and treatments.

Mallory-Weiss syndrome is a condition in which the inner lining of the esophagus tears at or near where it connects to the stomach.

Your esophagus is the tube that carries food from your throat to your stomach. It plays a vital role in digestion. Sometimes, violent coughing or vomiting can tear the tissue of your lower esophagus and it can start to bleed. The ...

Malocclusion is when a child’s teeth become crooked or crowded. The child may also have a problem with their bite. That means the teeth of the upper jaw don’t meet normally with the teeth of the lower jaw when the jaw is closed.

A mammogram is way to look at your breast using X-rays. It is used to find and diagnose breast disease in women. Your healthcare provider may order a mammogram if you have a breast problem such as a lump, pain, or discharge from a ...

An ovarian cyst is a fluid-filled sac that forms on or inside an ovary. Sometimes the cyst can break open (rupture).

Marfan syndrome is an inherited disorder of the connective tissue that causes abnormalities in the eyes, bone, heart and blood vessels.

Marfan syndrome is a genetic disorder that affects the body's connective tissue. Connective tissue holds the body's cells, organs, and other tissue together. Connective tissue is also important in growth and development.

A mastectomy is surgery to remove a breast. It is part of treatment for breast cancer. Here's what you need to know about this procedure.

Detailed information on breastfeeding and mastitis

Mastoiditis is a complication of a middle ear infeciton. Read on to learn more about symptoms, diagnosis, and treatment.

McArdle disease is a rare muscle disorder. In McArdle disease, the muscle cells can’t effectively store energy. Read on to learn more.

Measles (rubeola) is a respiratory illness caused by a virus. It causes a red, blotchy rash. It’s a very contagious illness.

Meckel diverticulum is a small pouch in the wall of the intestine. It’s near where the small and large intestines meet. This condition is the most common birth defect of the digestive system. It happens to about 1 in 50 babies.

Meconium aspiration happens when a newborn breathes in a mixture of meconium and amniotic fluid. Amniotic fluid is the liquid that surrounds the baby in the womb. Meconium is the baby's first stool, or poop, which is sticky, thick, and ...

The menisci are crescent-shaped bands of thick, rubbery cartilage attached to the shinbone. They act as shock absorbers and stabilize the knee. Meniscus tears can vary widely in size and severity. Some, but not all, require surgical repair.

The medial collateral ligament's main function is to prevent the leg from extending too far inward, but it also helps keep the knee stable and allows it to rotate. Injuries to the medial collateral ligament most often happen when the ...

Medial epicondylitis causes pain from the elbow to the wrist on the inside (medial side) of the elbow. Read on to learn about this condition.

The mediastinum is the area that separates the lungs. It is surrounded by the breastbone in front and the spine in back, with the lungs on either side. It encompasses the heart, aorta, esophagus, thymus (a gland in the back of the neck) ...

A mediastinoscopy is a procedure used to examine the mediastinum. This is the space behind the breastbone (sternum). Read on to learn more about the procedure, and what to expect.