Conditions & Treatments


Major depression, also known as clinical depression or unipolar depression, is classified as a type of affective disorder or mood disorder that goes beyond the day's ordinary ups and downs, becoming a serious medical condition and important health concern in this country.


Malaria is a disease caused by a parasite that is transmitted person-to-person by the bite of an infected Anopheles mosquito. These mosquitoes are present in the tropics and subtropics in almost all countries.


Male factor infertility is defined as any condition impacting sperm function and its ability to fertilize an egg.


Malocclusion refers to any degree of irregular contact of the teeth of the upper jaw with the teeth of the lower jaw, including overbites, underbites, and crossbites.


Manic depression, also known as bipolar disorder, is classified as a type of affective disorder or mood disorder that goes beyond the day's ordinary ups and downs, becoming a serious medical condition and important health concern in this country.


Marfan syndrome is a disorder involving the body's connective tissue, caused by an abnormality (or mutation) in one specific gene (FBN1).


Mastalgia is breast pain and is generally classified as either cyclical (associated with menstrual periods) or noncyclic.


Mastitis is often used interchangeably with the term breast infection, but mastitis may also be due to an inflammation. Often a reddened area is noted on the breast.


Measles is a viral illness characterized by a distinct rash and a fever.


Meckel's diverticulum is a small pouch in the wall of the intestine, near the junction of the small and large intestines. It is the most common birth defect of the digestive system.


Medial epicondylitis, also known as golfer's elbow, baseball elbow, suitcase elbow, or forehand tennis elbow, is characterized by pain from the elbow to the wrist on the palm side of the forearm.


Certain medical conditions may complicate a pregnancy. However, with proper medical care, most women can enjoy a healthy pregnancy, despite their medical challenges.


Megaloblastic anemia is a type of anemia characterized by very large red blood cells.


Megaureter (dilated ureter) is an abnormality of one or both of the ureters of a child.


Melanoma is a disease of the skin in which cancer cells are found in the melanocytes, the cells that produce color in the skin or pigment known as melanin.


Ménière's disease is a balance disorder caused by an abnormality found in a section of the inner ear called the labyrinth.


Meningitis is an inflammation of the meninges, the membranes that surround the brain.


Menopause refers to the time in a woman’s life when the menstrual cycle stops permanently. It is a normal, natural event that occurs in all women.


Menorrhagia is the most common type of abnormal uterine bleeding characterized by heavy and prolonged menstrual bleeding.


Many children and adolescents have mental health problems that interfere with their normal development and daily life activities. Some are mild, while others are more severe.


Merkel cell cancer is also known as neuroendocrine cancer of the skin, or trabecular cancer.


Metabolic syndrome is a condition that includes the presence of a cluster of risk factors specific for cardiovascular disease. Metabolic syndrome significantly raises the risk of developing diabetes, heart disease, and/or stroke.


Microcephaly is a condition that is present at birth in which the baby's head is much smaller than normal for an infant of that age and gender.


Micropenis is defined as a normally structured penis that is below the normal size range for an infant.


This detailed overview of mitral valve prolapse (MVP) covers causes, symptoms and diagnosis along with surgical treatments such as mitral valve repair.


Molluscum contagiosum is a viral disease of the skin that causes small, pink or skin-colored bumps on the skin


Infectious mononucleosis, also known as mononucleosis, "mono," or glandular fever, is characterized by swollen lymph glands and chronic fatigue.


Some people call it a cold sore, others a fever blister, but this annoying and often painful chronic condition is caused by the same virus: herpes simplex.


Multiple pregnancy is a pregnancy involving more than one fetus. Twins, triplets, quadruplets, and so on, are multiple pregnancies.


Multiple sclerosis (MS) is a chronic disease of the central nervous system. It is thought to be an autoimmune disorder. It is an unpredictable condition that can be relatively benign, disabling, or devastating.


Mumps is an acute and highly contagious viral illness that usually occurs in childhood. Spread by airborne droplets from the upper respiratory tract, the disease usually takes two to three weeks to appear.


Tension headaches are the most common type of headache. Stress and muscle tension are often factors in tension type headaches.


Muscular dystrophy (MD) is a broad term that describes a genetic (inherited) disorder of the muscles. Muscular dystrophy causes the muscles in the body to become very weak.


Myasthenia gravis (MG) is a complex, autoimmune disorder in which antibodies destroy neuromuscular connections. This causes problems with the voluntary muscles of the body, especially the eyes, mouth, throat, and limbs.


Myeloma bone disease is cancer that affects certain white blood cells called plasma cells.