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Diseases and Medical Conditions M-O provides down-to-earth, comprehensive definitions of hundreds of ailments and illnesses beginning with the letters M-O. Each listing identifies causes, incidence and risk factors, notes symptoms, outlines tests and discusses treatments and support groups where applicable.
Featured Article: Obsessive-compulsive Disorder
Obsessive compulsive disorder (OCD) is an anxiety disorder where a person performs tasks to relieve obsessions. Learn about obsessive compulsive disorder symptoms, tests and treatments. See more »
Malignant Hypertension (arteriolar Nephrosclerosis)
Malignant hypertension (arteriolar nephrosclerosis) is very high blood pressure and organ damage. Learn about malignant hypertension causes, symptoms, treatment and prevention.
See more »Malignant Hyperthermia
Malignant hyperthermia is a disease that causes rapid fever and muscle contractions from anesthetic exposure. Learn about malignant hyperthermia causes, symptoms, treatment and prevention.
See more »Malignant Otitis Externa
Malignant otitis externa is the spread of otitis externa infection to the base of the skull. Learn about malignant otitis externa causes, symptoms, treatment and prevention.
See more »Malignant Teratoma
Malignant teratoma is cancer consisting of cysts containing one of three main embryonic cell types. Learn about malignant teratoma causes, symptoms, treatment and prevention.
See more »Mallory-Weiss Tear
Mallory-Weiss tears occur in the mucous membrane from prolonged vomiting or excessive alcohol ingestion. Learn about Mallory-Weiss tear causes, symptoms, tests, treatment and prevention.
See more »Malnutrition
Malnutrition is the condition resulting from lack of nutrients caused by poor diet, medical conditions or others. Learn about malnutrition causes, symptoms, tests, treatment and prevention.
See more »Malocclusion Of Teeth
Malocclusion of teeth refers to the improper alignment of tooth and jaw structures and has 3 classifications. Learn about malocclusion of teeth causes, symptoms, tests, treatment and prevention.
See more »Maple Syrup Urine Disease
Maple syrup urine disease or MSUD is the inability to metabolize certain amino-acids resulting in acidosis. Learn about MSUD causes, symptoms, tests, treatment and prevention.
See more »Marfan Syndrome
Marfan syndrome is a connective tissue disorder affecting the skeletal and cardiovascular systems. Learn about Marfan syndrome causes, symptoms, treatment and prevention.
See more »Marijuana Intoxication
Marijuana intoxication refers to the relaxation, sleepiness and mild euphoria felt from smoking or ingestion. Learn about marijuana intoxication causes, symptoms, tests, treatment and prevention.
See more »Mastoiditis
Mastoiditis is an infection of the mastoid bone of the skull. Learn about mastoiditis causes, symptoms, treatment and prevention.
See more »Maternal Deprivation Syndrome
Maternal deprivation syndrome is the failure to thrive caused by neglect from the primary caregiver. Learn more about maternal deprivation syndrome causes, symptoms, tests, treatment and prevention.
See more »Mathematics Disorder
Mathematics disorder is a substantially lower mathematical ability than age and intellect suggest. Learn about mathematics disorder causes, symptoms, tests, treatment and prevention.
See more »McArdle Syndrome
McArdle syndrome is a gene mutation creating an inability to break down glycogen. Learn about McArdle syndrome causes, symptoms, treatment and prevention.
See more »McCune-Albright Syndrome
McCune-Albright syndrome, a genetic disease, causes hormonal problems and premature sex development. Learn about McCune-Albright syndrome causes, symptoms, treatment and prevention.
See more »Measles
Rubeola or measles is a contagious virus causing fever, cough, conjunctivitis and rash. Learn about rubeola causes, symptoms, tests, treatment and prevention.
See more »Meatal Stenosis
Meatal stenosis is a narrowing of the urethral opening. Learn about meatal stenosis causes, symptoms, treatment and prevention.
See more »Meckel's Diverticulum
Meckel's diverticulum is a congenital pouch on the wall of the small bowel. Learn about Meckel’s diverticulum causes, symptoms, treatment and prevention.
See more »Meconium Aspiration (inhalation)
Meconium aspiration (inhalation) is when a mixture of amniotic fluid and feces is inhaled by a newborn. Learn about meconium aspiration inhalation causes, symptoms, treatment and prevention.
See more »Mediastinal Tumor
Mediastinal tumors form in the separating cavity of the lungs, often benign in children and malignant in adults. Learn about mediastinal tumors causes, symptoms, tests, treatment and prevention.
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