Filters
Showing 24 of 722
Lymphocytic Leukemia
Lymphocytic leukemia is a cancer of lymphocytes, a type of white blood cell that helps the immune system fight infection. This page…
Lymphoma
Lymphoma is a cancer that starts in lymphocytes, a type of white blood cell in the lymphatic system. This system includes lymph…
Lynch Syndrome
Lynch syndrome is an inherited condition that increases a person's risk of developing colorectal and several other cancers. It results from changes…
Macular Degeneration
Macular degeneration is an eye disease that damages the macula, the central part of the retina responsible for sharp, detailed vision. It…
Malaria
Malaria is an illness caused by Plasmodium parasites that infect red blood cells. Infected female Anopheles mosquitoes can transmit the parasites when…
Maturity-Onset Diabetes Of The Young
Maturity-onset diabetes of the young (MODY) is an inherited form of diabetes caused by a change in a single gene. It often…
Mch Blood Test
An MCH blood test is a measurement included in a complete blood count (CBC). MCH, or mean corpuscular hemoglobin, estimates the average…
Mcv Blood Test
MCV stands for mean corpuscular volume. An MCV blood test measures the average size of your red blood cells and is usually…
Measles
Measles is a highly contagious viral illness that spreads through the air. It most often affects children who are not immune, but…
Medical Genetics
Genetic testing and counseling to identify hereditary conditions and inherited disease risk factors.
Medical Oncology
Non-surgical cancer treatment, including chemotherapy, targeted therapy, immunotherapy, and ongoing monitoring for patients.
Memory Loss
Memory loss means having difficulty remembering, learning, storing, or recalling information. Occasional forgetfulness can happen to anyone, but changes that interfere with…
Meningiomas
Meningiomas are tumors that arise from the meninges, the protective layers surrounding the brain and spinal cord. Many grow slowly and are…
Meningococcal Disease
Meningococcal disease is a serious infection caused by the bacterium Neisseria meningitidis. It can cause meningitis, an infection of the tissues around…
Metabolic Syndrome
Metabolic syndrome is a group of health findings that occur together and raise the risk of heart disease, stroke, and type 2…
Migraine
Migraine is a neurological condition that can cause recurring attacks of head pain and other symptoms. The pain may be moderate to…
Mitral Stenosis
Mitral stenosis is a narrowing of the mitral valve, which sits between the heart’s left atrium and left ventricle. This narrowing makes…
Mitral Valve Disease
The mitral valve is between the left atrium and left ventricle, the two chambers on the left side of the heart. It…
Mitral Valve Regurgitation
Mitral valve regurgitation is backward blood flow through the mitral valve when it does not close tightly. Normally, this valve allows blood…
Morbid Obesity
Morbid obesity is an older term for severe obesity, now generally called class 3 obesity. In adults, it is commonly classified using…
Multiple Myeloma
Multiple myeloma is a blood cancer that begins in plasma cells, immune cells made in the bone marrow. In this disease, abnormal…
Multiple Sclerosis
Multiple sclerosis is a chronic disease in which an abnormal immune response damages myelin and other nerve structures in the brain and…
Muscle Cramps
Muscle cramps are sudden, involuntary contractions that make a muscle tighten and become painful or stiff. A cramp can affect the legs,…
Muscle Tissue Tumor
A muscle tissue tumor is an abnormal growth that develops in skeletal muscle or another type of muscle tissue. Some tumors are…
