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Multiple endocrine neoplasia, type 1 (MEN 1)
Learn about diagnosis and treatment for multiple endocrine neoplasia, type 1 (MEN 1) — a rare disorder that causes tumors and overproduction of hormones.
Monoamine oxidase inhibitors (MAOIs)
These antidepressants require diet restrictions and avoiding certain medications to prevent serious side effects. They may help if other treatments fail.
Mixed connective tissue disease
Mixed connective tissue disease has signs and symptoms of multiple disorders, making it difficult to diagnose. There's no cure, but medications can help.
Milk allergy
Find out what happens when the immune system reacts to proteins in milk, causing allergic signs and symptoms such as hives and wheezing.
Migraines and gastrointestinal problems: Is there a link?
Migraines can be associated with certain gastrointestinal problems. Learn more.
Microscopic colitis
Ongoing, watery diarrhea could be a sign of this condition of the colon. Find out about testing and treatment.
Metabolic syndrome
Having three or more specific risk factors, such as high blood pressure or abdominal fat, boosts your risk of type 2 diabetes and heart disease.
Meditation
Find out more about this mind-body practice and its possible health benefits.
Medical abortion
Learn what to expect when medicine is used to end a pregnancy, including side effects, risks and possible complications.
Male infertility
Male infertility often plays a role when couples have trouble conceiving. Find out what causes male infertility and available options for treatment.
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