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THE MERCK MANUAL MEDICAL LIBRARY: The Merck Manual of Medical Information--Home Edition
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Me

Mean corpuscular hemoglobin (MCH)

Blood Tests Tables

Mean corpuscular hemoglobin concentration (MCHC)

Blood Tests Tables

Mean corpuscular volume (MCV)

Complete Blood Count (CBC) Tables
Blood Tests Tables

Measles (rubeola)

Some Viral Infections At a GlanceTables
Measles

  • immunization for

  • Protecting Children Against Disease Through Vaccines Tables
    Protecting Adults Against Common Infectious DiseasesTables
    Common Vaccinations: Measles, Mumps, and Rubella
    Vaccinations
    Vaccinating Infants and ChildrenFigures
    Measles: Prevention

  • in HIV-infected children

  • Human Immunodeficiency Virus (HIV) Infection: Vaccination

  • Koplik's spots of

  • Color Changes in the MouthSidebar

  • subacute sclerosing panencephalitis with

  • Subacute Sclerosing Panencephalitis (SSPE)

    Measles, German

    see Rubella

    Measurements, tables for

    Weights and Measures

    Mechanical ventilation

    see also Ventilation, mechanical
    Chronic Obstructive Pulmonary Disease (COPD): Treatment of Flare-ups
    Acute Respiratory Distress Syndrome (ARDS): Treatment
    Mechanical Ventilation

    Meckel's diverticulum

    Meckel's Diverticulum
    Meckel's DiverticulumFigures

    Meconium

    Labor
    First Few Days: Urine and Bowel Movements

  • aspiration of

  • Postmaturity
    Meconium Aspiration Syndrome

  • ileus with, in cystic fibrosis

  • Cystic Fibrosis (CF): Symptoms

  • peritonitis with

  • Abdominal Pain in Newborns, Infants, and Young ChildrenTables

    Medial epicondylitis (forehand tennis elbow)

    Tennis ElbowFigures
    Medial Epicondylitis
    Strengthening the Wrist MusclesSidebar

    Median nerve compression (carpal tunnel syndrome)

    Nerve Compression Syndromes: Carpal Tunnel Syndrome

    Mediastinoscopy

    Diagnosis: Mediastinoscopy
    Diagnostic Procedures Tables

    Mediastinum

    Chest Cavity

    Medical decision making

    Medical Decision Making

    MedicAlert Foundation

    Me - My

    Medical information

    Information Sources
    Participating in Decision Making

    Medical malpractice

    Medical Malpractice

    Medical records

    Handling Medical Records
    What Should Be in a Personal Medical Record?Sidebar

    Medicare

    How Health Care Is Paid For: Paying for Drugs

    Medications

    see Drugs

    Medicine

  • science of

  • The Science of Medicine and Clinical Trials

    Meditation

    Types of Alternative Medicine: Meditation

    Mediterranean fever, familial

    Familial Mediterranean Fever

    Medium chain acyl-CoA dehydrogenase (MCAD) deficiency

    Lipid Metabolism: Fatty Acid Oxidation Disorders

    Medroxyprogesterone

  • in contraception

  • How Effective Is Contraception?Tables
    Comparing Contraceptive MethodsTables
    Contraception: Contraceptive Injections

  • in ovulation problems

  • Problems With Ovulation: Treatment

  • in undernutrition

  • Undernutrition: Drugs

    Medullary cystic disease

    Nephronophthisis–Medullary Cystic Disease Complex

    Medullary sponge kidney

    Medullary Sponge Kidney

    Medulloblastoma

    Tumors That Originate in or Near the Brain Tables

    Mefloquine

    Malaria: Treatment

    Megacolon

  • congenital

  • Digestive Tract Defects: Hirschsprung's Disease

  • toxic

  • Ulcerative Colitis: Complications
    Ulcerative Colitis: Surgery

    Megaesophagus

    Abnormal Propulsion of Food: Achalasia

    Megestrol

    Human Immunodeficiency Virus (HIV) Infection: Treatment

    Meglitinides

    Diabetes Mellitus (DM): Oral Antihyperglycemic Drugs
    Oral Antihyperglycemic DrugsTables

    Meige's disease

    Dystonia: Focal and Segmental Dystonias

    Melanin

    Structure and Function: Epidermis
    Hair Disorders
    Pigment Disorders
    Sunlight and Skin Damage: Natural Protection

  • absence of (albinism)

  • Albinism

    Melanocytes

    Getting Under the SkinFigures
    Structure and Function: Epidermis
    Pigment Disorders

  • loss of (vitiligo)

  • Vitiligo

    Melanocyte-stimulating hormone

    Pituitary: The Master GlandFigures
    Pituitary Gland Disorders

    Melanoma

    Melanoma

  • choroid

  • Cancers Affecting the Retinal: Choroidal Melanoma

  • dysplastic nevi and

  • Moles

  • mole changes and

  • Moles

  • in mouth

  • Cancerous Growths: Types of Oral Cancer

  • warning signs of

  • Warning Signs of MelanomaSidebar

    Melanonychia striata

    Deformities and Discoloration: Melanonychia Striata

    Melanosis, smoker's

    Color Changes in the MouthSidebar

    Melanosis coli

    Symptoms: Laxatives

    Melasma

    Melasma
    Contraception: Disadvantages
    Physical Changes: Skin

    Melatonin

  • in insomnia

  • Insomnia: Treatment

  • in jet lag

  • Problems in Transit: Sleep Disturbance

  • as nutraceutical

  • Melatonin

    Melena

    Symptoms: Bleeding from the Digestive Tract
    Symptoms: Causes

    Melphalan

    Chemotherapy DrugsTables

    Memantine

    Dementia: Drugs to Slow Progression
    Dementia: Treatment

    Membrane(s)

  • amniotic, rupture of

  • Labor

  • premature

  • Labor and Timing Problems: Premature Rupture of the Membranes

  • cell

  • Cells

  • epiretinal

  • Macular Pucker

  • mucous

  • see also Mucous membranes

  • barrier function of

  • Defenses Against Infection: Physical Barriers

  • drug-related blistering of

  • Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis

    Membranoproliferative glomerulonephritis

    Primary Glomerular Disorders That Can Cause Nephrotic Syndrome Tables

    Membranous glomerulonephritis

    Primary Glomerular Disorders That Can Cause Glomerulonephritis Tables
    Primary Glomerular Disorders That Can Cause Nephrotic Syndrome Tables

    Memory

  • age-associated changes in

  • How the Body Ages: Some Normal ChangesTables
    Dementia

  • alcohol and

  • Alcohol: Symptoms and Complications

  • in dementia

  • Dementia: Early

  • in Korsakoff's syndrome

  • Alcohol: Symptoms and Complications

  • loss of

  • Specific Types of Dysfunction: Amnesia
    Thanks for the MemoriesSidebar

  • in dissociative amnesia

  • Dissociative Amnesia

  • in dissociative fugue

  • Dissociative Fugue

  • in dissociative identity disorder

  • Dissociative Identity Disorder: Symptoms

  • in temporal lobe injury

  • Dysfunction by Location: Temporal Lobe Damage

    Memory aids, for drug compliance

    Adherence to Drug Treatment: Improving Adherence

    Menaquinone

    Vitamin K

    Menarche

    Puberty

    Ménétrier's disease

    Gastritis: Causes
    Gastritis: Symptoms and Complications

    Meniere's disease

    Vertigo: Inner Ear Disorders

    Meninges

    Viewing the BrainFigures
    Brain: Meninges
    How the Spine Is OrganizedFigures

    Meningioma

    Tumors That Originate in or Near the Brain Tables
    Common Symptoms of Some Brain TumorsSidebar
    Tumors That Originate in or Near the Spinal Cord Tables

    Meningitis

  • arenavirus

  • Lymphocytic Choriomeningitis

  • bacterial

  • Acute Bacterial Meningitis

  • in children

  • Central Nervous System Infections

  • aseptic

  • Enteroviral Infections: Common in ChildhoodSidebar

  • bacterial

  • Meningitis

  • chronic

  • Chronic Meningitis
    Common Infections That Can Cause Meningitis Tables
    Some Noninfectious Causes of MeningitisTables

  • Cryptococcus neoformans

  • Cryptococcosis

  • with HIV infection

  • Common Opportunistic Infections Associated With AIDSTables

  • with ear infection

  • Middle Ear Infections: Acute Middle Ear Infection

  • headache with

  • Headaches: Diagnosis
    How Headaches Differ Tables

  • meningococcal

  • immunization for

  • Protecting Children Against Disease Through Vaccines Tables
    Common Vaccinations: Meningococcal Infections

  • meningococcal, immunization for

  • Protecting Adults Against Common Infectious DiseasesTables
    Vaccines for International TravelTables

  • in newborn

  • Sepsis: Symptoms and Diagnosis
    Meningitis: Causes

  • noninfectious

  • Some Noninfectious Causes of MeningitisTables

  • in syphilis

  • Syphilis: Symptoms

  • tuberculous

  • Tuberculosis (TB): Symptoms and Complications

  • viral

  • Aseptic Meningitis

    Meningocele

    Brain and Spinal Cord Defects: Neural Tube Defects
    Spina Bifida: A Defect of the SpineFigures

    Meningococcemia

    Acute Bacterial Meningitis: Symptoms

    Meningoencephalitis

  • amebic

  • Amebic Infections Due to Free-Living Amebas: Primary Amebic Meningoencephalitis

    Meningoencephalitis, mumps

    Mumps: Symptoms and Diagnosis
    Mumps: Treatment

    Meningoencephalocele

    Brain and Spinal Cord Defects: Neural Tube Defects

    Meningomyelocele

    Brain and Spinal Cord Defects: Neural Tube Defects
    Spina Bifida: A Defect of the SpineFigures

    Menkes syndrome

    Copper: Copper Deficiency

    Menometrorrhagia

    Deciphering Medical Terms for Menstrual DisordersTables

    Menopause

    Effects of Aging
    Menopause
    Some Drugs Used to Treat Symptoms and Effects of MenopauseTables

  • bleeding after

  • Deciphering Medical Terms for Menstrual DisordersTables

  • gingivitis after

  • Gingivitis: Gingivitis due to Menopause

  • hormone therapy for

  • Menopause: Hormone Therapy
    Some Drugs Used to Treat Symptoms and Effects of MenopauseTables

  • osteoporosis after

  • Osteoporosis
    Loss of Bone Density in WomenFigures
    Risk Factors for Osteoporosis in WomenSidebar

  • premature

  • Menopause
    Premature Menopause

  • vaginal bleeding after

  • Vaginal Bleeding (Abnormal)
    Cancer of the Uterus: Symptoms and Diagnosis

  • weight gain after

  • Obesity and the Metabolic Syndrome: Pregnancy and Menopause

    Menorrhagia

    Deciphering Medical Terms for Menstrual DisordersTables

    Menstrual cycle

    Internal Genital Organs: Uterus and Cervix
    Menstrual Cycle
    Changes During the Menstrual CycleFigures

  • in acromegaly

  • Acromegaly and Gigantism: Symptoms

  • discharge during

  • Symptoms: Vaginal Discharge

  • disorders of

  • Menstrual Disorders and Abnormal Vaginal Bleeding
    Deciphering Medical Terms for Menstrual DisordersTables
    Symptoms of Premenstrual SyndromeSidebar
    Adenomyosis: Noncancerous Growth of the UterusSidebar
    What Is Pelvic Congestion Syndrome?Sidebar

  • first (menarche)

  • Puberty

  • galactorrhea and

  • Galactorrhea: Symptoms

  • during perimenopause

  • Menopause: Perimenopause

    Mental health disorders

  • anxiety disorders

  • Anxiety Disorders

  • Asperger's disorder

  • Asperger's Disorder and Pervasive Developmental Disorder Not Otherwise Specified

  • autism

  • Autism

  • bipolar disorder

  • Manic-Depressive Illness

  • childhood disintegrative disorder

  • Childhood Disintegrative Disorder

  • in children

  • Mental Health Disorders
    Symptoms of Depression in ChildrenSidebar
    Risk Factors for Child and Adolescent SuicideSidebar
    Effects of Stress on ChildrenSidebar

  • classification of

  • Classification and Diagnosis of Mental Illness

  • deinstitutionalization and

  • Mental Illness in Society: Deinstitutionalization

  • depression

  • see also Depression
    Depression
    Some Causes of Depression Tables
    What Is Seasonal Affective Disorder?Sidebar
    Drugs Used to Treat DepressionTables

  • digestive system disorders and

  • Diagnosis: Psychologic Evaluation

  • dissociative disorders

  • Dissociative Disorders

  • eating disorders

  • Eating Disorders
    Recognizing AnorexiaSidebar

  • health care practitioners for

  • Treatment of Mental Illness
    Types of Mental Health Care PractitionersTables

  • information resources on

  • Pa - Ps

  • mania

  • Manic-Depressive Illness

  • manic-depressive disorder (bipolar disorder)

  • Bipolar Disorder (Manic-Depressive Illness)
    Some Causes of Mania Tables
    Manic-Depressive Illness

  • with marijuana use

  • Marijuana: Symptoms and Complications

  • mental retardation and

  • Mental Retardation/Intellectual Disability: Symptoms

  • mood disorders

  • Mood Disorders

  • overview of

  • Overview of Mental Health Care

  • personality disorders

  • Personality Disorders
    Consequences of Personality DisordersSidebar
    Common Coping MechanismsTables

  • pervasive developmental disorder not otherwise specified

  • Asperger's Disorder and Pervasive Developmental Disorder Not Otherwise Specified

  • Rett's disorder

  • Rett's Disorder

  • schizophrenia

  • Schizophrenia
    Antipsychotic DrugsTables
    Antipsychotic Drugs: How Do They Work?Sidebar
    Childhood Schizophrenia

  • sexual disorders

  • Sexuality

  • social aspects of

  • Mental Illness in Society

  • somatoform disorders

  • Somatoform Disorders
    Mind and BodySidebar
    Somatoform Disorders

  • suicidal behavior

  • Suicidal Behavior
    Risk Factors for SuicideSidebar
    Suicide Intervention: Crisis Hot LinesSidebar
    Suicidal Behavior
    Risk Factors for Child and Adolescent SuicideSidebar

  • travel and

  • Specific Medical Conditions and Travel: Other Conditions

  • treatment of

  • Treatment of Mental Illness

    Mental retardation

    Mental Retardation/Intellectual Disability
    Levels of Mental Retardation/Intellectual DisabilityTables
    Some Causes of Mental Retardation/Intellectual DisabilitySidebar

  • in Down syndrome

  • Down Syndrome

  • in fragile X syndrome

  • Fragile X Syndrome

  • information resources on

  • Me - My

  • in phenylketonuria

  • Amino Acid Metabolism: Phenylketonuria

    Mental status examination

    Physical Examination: Mental Status
    Mental Status TestingTables

    Meperidine

    Opioid AnalgesicsTables

  • in elderly persons

  • Some Drugs With Increased Risk for Older People Tables

    Meprobamate

  • abuse of

  • Antianxiety Drugs and Sedatives

  • in elderly persons

  • Some Drugs With Increased Risk for Older People Tables

    Mercaptopurine

    Chemotherapy DrugsTables

  • in Crohn's disease

  • Crohn's Disease: Immunomodulating Drugs
    Drugs That Reduce Bowel InflammationTables

  • during pregnancy

  • Some Drugs That Can Cause Problems During PregnancyTables

  • in ulcerative colitis

  • Ulcerative Colitis: Immunomodulating Drugs
    Drugs That Reduce Bowel InflammationTables

    Meropenem

    AntibioticsTables

    Mesalamine

  • in Crohn's disease

  • Crohn's Disease: Anti-inflammatory Drugs
    Drugs That Reduce Bowel InflammationTables

  • in proctitis

  • Proctitis: Treatment

  • in ulcerative colitis

  • Ulcerative Colitis: Anti-inflammatory Drugs
    Drugs That Reduce Bowel InflammationTables

    Mesangial proliferative glomerulonephritis

    Primary Glomerular Disorders That Can Cause Nephrotic Syndrome Tables

    Mescaline

    Hallucinogens

    Mesenteric artery, blockage of

    Occlusive Peripheral Arterial Disease: Superior Mesenteric Artery
    When the Blood Supply to the Intestine Is BlockedFigures
    Occlusive Peripheral Arterial Disease: Superior Mesenteric Artery

    Mesoridazine

    Antipsychotic DrugsTables

    Mesothelioma

    Asbestosis
    Asbestosis: Prevention and Treatment

    Meta-analysis

    Information Sources: Research Studies

    Metabisulfite

    Food Allergy