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Mean arterial pressure

post-resuscitation		Cardiopulmonary Resuscitation (CPR): BP support

shock and		Intravenous Fluid Resuscitation: End Point and Monitoring Intravenous Fluid Resuscitation: Traumatic hemorrhagic shock

Mean corpuscular hemoglobin (MCH)		Evaluation of Anemia: Testing

Mean corpuscular hemoglobin content (MCHC)		Evaluation of Anemia: Testing

Mean corpuscular volume (MCV)		Evaluation of Anemia: Testing

in perinatal anemia		Perinatal Hematologic Disorders: Testing

Measles (rubeola)		see also Rubella Some Exanthematous Viruses Other Viruses

atypical		Other Viruses: Complications

rickettsial disease vs		Rickettsiae and Related Organisms: Differentiating rickettsial from other infections

rubella vs		Rubella: Diagnosis

subacute sclerosing panencephalitis after		Subacute Sclerosing Panencephalitis (SSPE)

vaccine against		Vaccines Available in the US Common Vaccinations for Adults Routine Vaccinations: Measles, Mumps, and Rubella Other Viruses: Prevention Recommended Immunization Schedule for Ages 0–6 yr Recommended Immunization Schedule for Ages 7–18 yr Catch-up Immunization Schedule for Ages 4 mo–18 yr

Measles-mumps-rubella vaccine		Vaccines Available in the US Common Vaccinations for Adults Routine Vaccinations: Measles, Mumps, and Rubella

in Kawasaki disease		Kawasaki Disease: Treatment

in pediatric HIV infection		Human Immunodeficiency Virus (HIV) Infection in Infants and Children: Vaccination Considerations for Use of Live Vaccines in Children With HIV Infection

schedule for		Recommended Immunization Schedule for Ages 0–6 yr Recommended Immunization Schedule for Ages 7–18 yr Catch-up Immunization Schedule for Ages 4 mo–18 yr

Measles-mumps-rubella-varicella vaccine		Vaccines Available in the US Routine Vaccinations: Measles, Mumps, and Rubella

Measurement

units of		Ready Reference Guides

Meat handler's wart		Wart Variants

mecA gene		Susceptibility Testing: Nucleic acid–based methods

Mechanical ventilation		see Ventilation

Mechlorethamine		Commonly Used Antineoplastic Drugs

Meckel's diverticulum		Nuclear Scans Meckel's Diverticulum

Meckel-Gruber syndrome		Major Groups of Cystic Nephropathies

Meckel scan		Nuclear Scans

Meclizine		Some Drugs for Vomiting

in motion sickness		Motion Sickness: Antihistamines

in pregnancy		Drugs With Adverse Effects During Pregnancy

in vertigo		Dizziness and Vertigo: Treatment

Meclofenamate		Nonopioid Analgesics

Meclofenamic acid		Nonopioid Analgesics

Meclopramide

in vomiting		Some Drugs for Vomiting

Meconium

passage of		Approach to the Care of Normal Infants and Children: Routine Care and Observation

suctioning of		Meconium Aspiration Syndrome: Treatment

Meconium aspiration syndrome		Small-for-Gestational-Age (SGA) Infant: Complications Meconium Aspiration Syndrome

Meconium ileus		Meconium Ileus Cystic Fibrosis (CF): GI

Meconium plug syndrome		Meconium Ileus: Meconium Plug Syndrome

Medial calcific sclerosis		Nonatheromatous Arteriosclerosis

Medial collateral ligament injury		Knee Sprains and Meniscal Injuries Ligaments of the knee.

Medial epicondylitis		Medial Epicondylitis

Median nerve compression		Nerve Compression Syndromes: Carpal Tunnel Syndrome Neutral wrist splint. Peripheral Neuropathy: Symptoms and Signs

Median rhomboid glossitis		Some Disorders of the Oral Region by Predominant Site of Involvement

Mediastinitis		Mediastinitis

fibrosing		Histoplasmosis: Symptoms and Signs

Mediastinoscopy		Mediastinoscopy and Mediastinotomy

Mediastinotomy		Mediastinoscopy and Mediastinotomy

Mediastinum

air in		Pneumomediastinum Pulpitis: Treatment

in infant		Pulmonary Air-Leak Syndromes: Pneumomediastinum

biopsy of		Mediastinal and Pleural Disorders: Diagnosis

carcinoma of		Metastatic Carcinoma of Unknown Primary Origin

Chamberlain procedure on		Hodgkin Lymphoma: Diagnosis

inflammation of		Mediastinitis

masses of		Mediastinal and Pleural Disorders Some causes of mediastinal masses in adults.

in children		Mediastinal and Pleural Disorders: Children

Medicaid		Medicaid

Medical insurance

private insurance		Financial Issues in Health Care: Private insurance Private Insurance for the Elderly

Medical malpractice		Medical Malpractice

Medicare		Medicare Funding Sources by Type of Care

Part A		Medicare: Part A

Part B		Medicare: Part B

Part C		Medicare: Part C (Medicare Advantage Plans)

Part D		Medicare: Part D Medicare Part D drug costs in 2010.

Medicare Advantage Plans		Medicare: Part C (Medicare Advantage Plans)

Medicolegal issues		Medicolegal Issues

Medigap		Private Insurance for the Elderly: Medigap

Meditation		Types of Alternative Medicine Mind-Body Medicine: Meditation

Mediterranean anemia		Thalassemias

Mediterranean fever		Brucellosis

familial		Familial Mediterranean Fever

Mediterranean spotted fever		Diseases Caused by Rickettsia, Ehrlichia, and Coxiella Spp Eastern Tick-Borne Rickettsioses

Medium-chain 3-ketoacyl-CoA thiolase deficiency		Disorders of Fatty Acid, Very Long-Chain Fatty Acid, and Glycerol Metabolism

Medium-chain acyl-CoA dehydrogenase deficiency		Disorders of Fatty Acid, Very Long-Chain Fatty Acid, and Glycerol Metabolism

Medium-chain acyl dehydrogenase deficiency		Fatty Acid and Glycerol Metabolism Disorders: Medium-chain acyl dehydrogenase deficiency (MCADD)

Medoidioplasty		Gender Identity Disorder and Transsexualism: Female-to-male transsexualism

Medroxyprogesterone

for contraception		Comparison of Common Contraceptive Methods Contraception: Progestin Injections

in dysfunctional uterine bleeding		Dysfunctional Uterine Bleeding (DUB): Bleeding

in endometriosis		Drugs Used to Treat Endometriosis

in hot flushes		Menopause: Hormone therapy

in pedophilia		Paraphilias: Treatment

in protein-energy undernutrition		Protein-Energy Undernutrition: Adults

in uterine fibroids		Uterine Fibroids: Drugs

Medullary cystic disease		Major Groups of Cystic Nephropathies Nephronophthisis and Medullary Cystic Kidney Disease Complex

Medullary sponge kidney		Medullary Sponge Kidney

Medulloblastoma		Common Localizing Manifestations of Brain Tumors Gliomas

in children		Brain Tumors in Children: Medulloblastoma

MedWatch		Adverse Drug Reactions: Diagnosis

Mees' lines		Nail Deformities: Discoloration

Mefloquine		Treatment of Malaria Prevention of Malaria Adverse Reactions and Contraindications of Antimalarial Drugs Malaria: Treatment of the acute attack

Megacolon

congenital		Jejunoileal and Large-Bowel Obstruction: Hirschsprung's Disease

toxic		Ulcerative Colitis: Pathophysiology Ulcerative Colitis: Fulminant colitis Jejunoileal and Large-Bowel Obstruction: Hirschsprung's Enterocolitis

Megacystis-microcolon, intestinal hypoperistalsis syndrome		Bladder Anomalies: Megacystis syndrome

Megacystis syndrome		Bladder Anomalies: Megacystis syndrome

Megaesophagus		Motility Disorders: Achalasia

Chagas		Chagas Disease: Chronic

Megaloblastic anemia		see also Anemia, megaloblastic Megaloblastic Macrocytic Anemias

oral lesions in		Oral Findings in Systemic Disorders

vitamin B₁₂ deficiency and		Sources, Functions, and Effects of Vitamins Vitamin B₁₂: Symptoms and Signs Characteristics of Common Anemias Megaloblastic Macrocytic Anemias: Etiology

Megestrol acetate

in cancer chemotherapy		Commonly Used Antineoplastic Drugs

in hot flushes		Menopause: Hormone therapy

in protein-energy undernutrition		Protein-Energy Undernutrition: Adults

in uterine fibroids		Uterine Fibroids: Drugs

Meglumine antimonate		Leishmaniasis: Cutaneous leishmaniasis

Meibomian glands

dysfunction of		Eyelid and Lacrimal Disorders: Chronic

infection of		Chalazion and Hordeolum

occlusion of		Chalazion and Hordeolum

Meige's disease		Causes of Pleural Effusion Lymphatic Disorders: Primary lymphedemas Dystonias: Segmental dystonias

Meigs' syndrome		Ovarian Cancer: Diagnosis

Meiosis		General Principles of Medical Genetics: Structure

Melancholy		Depressive Disorders: Major depression (unipolar disorder)

Melanin-concentrating hormone		Pathways Regulating Food Intake

Melanocyte-stimulating hormone (MSH)		Pathways Regulating Food Intake Principles of Endocrinology: Other hormones Physiology of Pregnancy: Endocrine

Melanoma		Oral Findings in Systemic Disorders Nail Deformities: Melanonychia striata Melanoma 5–Yr Survival* for Malignant Melanoma Relative to Thickness and Ulceration

atypical nevi and		Moles: Diagnosis

choroid		Cancers Affecting the Retina: Choroidal melanoma

vulvar		Vulvar Cancer: Pathology

Melanonychia striata		Nail Deformities: Melanonychia striata

Melanoptysis		Coal Workers' Pneumoconiosis: Symptoms and Signs

Melanosis coli		Constipation: Types of laxatives

Melarsoprol		African Trypanosomiasis: With CNS involvement

MELAS		Mitochondrial Oxidative Phosphorylation Disorders: Mitochondrial encephalomyopathy, lactic acidosis, and strokelike episodes (MELAS) Mitochondrial Disorders

Melasma		Hyperpigmentation: Melasma (chloasma) Physiology of Pregnancy: Dermatologic

oral contraceptives and		Contraception: Adverse effects

Melatonin		Melatonin

aging-related changes in		Endocrine Disorders: Aging and Endocrinology

in jet lag		Air Travel: Circadian dysrhythmia (jet lag)

in sleep disorders		Approach to the Patient With a Sleep or Wakefulness Disorder: Other sedatives

Melena		GI Bleeding

Melioidosis		Melioidosis

Melnick-Fraser syndrome		Major Groups of Cystic Nephropathies

Melphalan		Multiple Myeloma: Treatment of malignant cells Commonly Used Antineoplastic Drugs

Memantine		Examples of Disorders Associated With Defects in Neurotransmission Drugs for Neuropathic Pain Dementia: Drugs Dementia: Treatment Drugs for Alzheimer's Disease

Membrane(s)

epiretinal		Epiretinal Membrane

Membrane attack complex (C5-C9) deficiency		Primary Immunodeficiency Disorders Characteristic Clinical Findings in Some Primary Immunodeficiency Disorders

Membrane-stabilizing drugs

in arrhythmias		Antiarrhythmic Drugs (Vaughan Williams Classification) Arrhythmias and Conduction Disorders: Class I

Membranoproliferative glomerulonephritis		Electron microscopic features in immunologic glomerular disorders. Nephritic and Nephrotic Syndromes: Membranoproliferative Glomerulonephritis

Membranous nephropathy		Nephrotic Syndrome: Membranous Nephropathy Electron microscopic features in immunologic glomerular disorders.

Memory

age-associated impairment of		Amnesias: Etiology Dementia: Diagnosis

disorders of		see also Amnesia Amnesias

evaluation of		Examination of Mental Status

loss of

in dementia		see Dementia

physical disorders and		Selected Mental Symptoms Due to Physical Disorders Selected Mental Symptoms Due to Physical Disorders

Menadione		see also Vitamin K Vitamin K: Vitamin K Toxicity

Menaquinones		Vitamin K

Menarche		Female Reproductive Endocrinology: Puberty Sexual Development

Mendelian disorders		see Genetic disorders

Ménétrier's disease		Gastritis: Ménétrier's disease

Meniere's disease		Some Causes of Tinnitus Some Causes of Dizziness and Vertigo Meniere's Disease Cranial Nerves

Meningioma		Common Localizing Manifestations of Brain Tumors Meningiomas Symptoms of Meningiomas by Site

orbital		Some Causes of Proptosis

Meningitis		Meningitis

Angiostrongylus		Angiostrongyliasis

aseptic		Syndromes Caused by Enteroviruses Enteroviruses: Aseptic meningitis Cerebrospinal Fluid Abnormalities in Various Infections Aseptic Meningitis Other Causes of CSF Inflammatory Response*

bacterial		Cerebrospinal Fluid Abnormalities in Various Disorders Cerebrospinal Fluid Abnormalities in Various Infections Acute Bacterial Meningitis Antibiotic Therapy for Acute Bacterial Meningitis Common IV Antibiotic Dosages for Bacterial Meningitis*

in children		Acute Bacterial Meningitis: Young children Acute Bacterial Meningitis: Diagnosis Acute Bacterial Meningitis: Other measures

listerial		Listeriosis: Symptoms and Signs Acute Bacterial Meningitis: Etiology Antibiotic Therapy for Acute Bacterial Meningitis Aseptic Meningitis: Differentiating bacterial meningitis from aseptic meningitis

meningococcal		Meningococcal Diseases Neurologic Diagnostic Procedures: Lumbar puncture (spinal tap) Acute Bacterial Meningitis: Etiology Antibiotic Therapy for Acute Bacterial Meningitis Acute Bacterial Meningitis: Other measures

in neonate		Neonatal Bacterial Meningitis

pneumococcal		Pneumococcal Infections: Diseases Caused by Pneumococci Acute Bacterial Meningitis: Etiology Antibiotic Therapy for Acute Bacterial Meningitis

staphylococcal		Acute Bacterial Meningitis: Etiology Antibiotic Therapy for Acute Bacterial Meningitis

streptococcal		Antibiotic Therapy for Acute Bacterial Meningitis Neonatal Bacterial Meningitis: Symptoms and Signs Neonatal Bacterial Meningitis: Organism-specific antibiotic therapy

vs aseptic meningitis		Aseptic Meningitis: Differentiating bacterial meningitis from aseptic meningitis

cancer and		Subacute and Chronic Meningitis: Etiology

chemical		Subarachnoid Hemorrhage (SAH): Pathophysiology

chronic		Cerebrospinal Fluid Abnormalities in Various Infections Subacute and Chronic Meningitis

crytococcal		Cryptococcosis: CNS Cryptococcosis: Patients without AIDS

in elderly		Unusual Presentations of Illness in the Elderly

fungal		Acute Bacterial Meningitis: Alternate diagnoses Subacute and Chronic Meningitis: Etiology Subacute and Chronic Meningitis: Diagnosis

herpes simplex virus		Herpes Simplex Virus (HSV) Infections: CNS infection

HIV infection and		Common Manifestations of HIV Infection by Organ System

lumbar puncture in		Meningitis: Diagnosis Cerebrospinal Fluid Abnormalities in Various Infections Acute Bacterial Meningitis: Diagnosis Aseptic Meningitis: Differentiating bacterial meningitis from aseptic meningitis Subacute and Chronic Meningitis: Diagnosis

Lyme		Guidelines for Antibiotic Treatment Lyme Disease in Adults*

meningococcal, immunization for		Vaccines for International Travel*^†

Mollaret's		Aseptic Meningitis: Viruses

mumps		Mumps: Complications

neoplastic		Subacute and Chronic Meningitis: Diagnosis

in premature infant		Premature Infant: Infection

prevention of		Acute Bacterial Meningitis: Prevention

subacute		Cerebrospinal Fluid Abnormalities in Various Infections Subacute and Chronic Meningitis

syphilitic		Cerebrospinal Fluid Abnormalities in Various Disorders

tuberculous		Tuberculosis (TB): TB meningitis Acute Bacterial Meningitis: Alternate diagnoses Aseptic Meningitis: Differentiating bacterial meningitis from aseptic meningitis Subacute and Chronic Meningitis: Diagnosis

viral		Acute Bacterial Meningitis: Alternate diagnoses Aseptic Meningitis: Viruses Other Causes of CSF Inflammatory Response*

Meningocele		Spina Bifida

Meningococcal infection		Neisseriaceae Meningococcal Diseases Neurologic Diagnostic Procedures: Lumbar puncture (spinal tap) Antibiotic Therapy for Acute Bacterial Meningitis

drotrecogin alfa in		Acute Bacterial Meningitis: Other measures

meningeal		Acute Bacterial Meningitis: Etiology

rickettsial infection vs		Rickettsiae and Related Organisms: Differentiating rickettsial from other infections

rifampin prophylaxis in		Usual Doses of Commonly Prescribed Antibiotics

vaccine against		Vaccines Available in the US Common Vaccinations for Adults Meningococcal Diseases: Vaccination Acute Bacterial Meningitis: Vaccinations Recommended Immunization Schedule for Ages 0–6 yr Recommended Immunization Schedule for Ages 7–18 yr Catch-up Immunization Schedule for Ages 4 mo–18 yr

Meningoencephalitis		see also Encephalitis see also Meningitis

amebic		Free-Living Amebas: Primary Amebic Meningoencephalitis Neurologic Diagnostic Procedures: Lumbar puncture (spinal tap) Acute Bacterial Meningitis: Alternate diagnoses

syphilitic		Syphilis: Late or tertiary syphilis

Meningomyelocele		Spina Bifida Spina Bifida: Treatment

Meniscus		Ligaments of the knee.

injury to		Knee Sprains and Meniscal Injuries

Menkes' syndrome		Trace Minerals Copper: Inherited Copper Deficiency

Menopause		Menopause

black cohosh and		Black Cohosh: Claims

premature		Premature Ovarian Failure Common Causes of Premature Ovarian Failure Menopause

vaginal bleeding after		Vaginal Bleeding

vaginitis after		Vaginitis: Postmenopausal women

Menorrhagia		Vaginal Bleeding Dysfunctional Uterine Bleeding (DUB): Symptoms and Signs

Menstruation		Female Reproductive Endocrinology: Menstrual Cycle The idealized cyclic changes in pituitary gonadotropins, estradiol (E₂), progesterone (P), and uterine endometrium during the normal menstrual cycle.

abnormalities of		Vaginal Bleeding Menstrual Abnormalities

absence of (amenorrhea)		Amenorrhea Some Causes of Anovulatory Amenorrhea Some Causes of Ovulatory Amenorrhea Findings Suggesting Possible Causes of Amenorrhea Evaluation of primary amenorrhea. Evaluation of secondary amenorrhea. Ovulatory Dysfunction: Treatment

cessation of		see Menopause

hematocolpos with		Symptoms of Gynecologic Disorders: Etiology Amenorrhea: Ovulatory amenorrhea

history of		Approach to the Gynecologic Patient: History

iron loss with		Iron Deficiency Anemia: Etiology

onset of (menarche)		Sexual Development

pain with		Dysmenorrhea

pneumothorax and		Pneumothorax: Etiology

porphyria and		Acute Porphyrias: Prevention

premenstrual syndrome and		Premenstrual Syndrome (PMS)

toxic shock syndrome with		Toxic Shock Syndrome (TSS)

Mental retardation		Intellectual Disability (ID) Tests for Some Causes of Intellectual Disability

chromosomal abnormalities and		Chromosomal and Genetic Causes of Intellectual Disability*

diagnosis of		Intellectual Disability (ID): Diagnosis Tests for Some Causes of Intellectual Disability

in Down syndrome		Down Syndrome: Symptoms and Signs

in fetal alcohol syndrome		Prenatal Drug Exposure: Alcohol

in fragile X syndrome		Fragile X Syndrome

prevention of		Intellectual Disability (ID): Prevention

Mental status

brain tumor and		Intracranial and Spinal Tumors: Symptoms and Signs

deterioration of		see Delirium see Dementia

examination of		see also Neurologic examination Routine Psychiatric Assessment: Mental Status Examination Approach to the Neurologic Patient: Mental status Examination of Mental Status Evaluation of the Elderly Patient: Mental status

in delirium		Delirium: Mental status examination

in dementia		Dementia: Clinical criteria

hospitalization and		Hospital Care and the Elderly: Mental Status Changes

postoperative		Postoperative Care: Mental status

Meperidine		Opioid Analgesics Equianalgesic Doses of Opioid Analgesics*

in elderly		Effect of Aging on Drug Metabolism* and Elimination Drug-Disease Interactions in the Elderly High-Risk Drugs in the Elderly (Based on the Beers Criteria)

in labor and delivery		Management of Normal Labor: Analgesia

poisoning with		Symptoms and Treatment of Specific Poisons

Mepolizumab		Some Immunotherapeutic Agents in Clinical Use*

Meprobamate

in elderly		High-Risk Drugs in the Elderly (Based on the Beers Criteria)

poisoning with		Symptoms and Treatment of Specific Poisons

6-Mercaptopurine

in cancer therapy		Commonly Used Antineoplastic Drugs

in inflammatory bowel disease		Inflammatory Bowel Disease (IBD): Immunomodulating drugs Crohn's Disease: Moderate to severe disease

poisoning with		Symptoms and Treatment of Specific Poisons

in pregnancy		Drugs With Adverse Effects During Pregnancy

Mercury

hyperpigmentation and		Hyperpigmentation Effects of Some Drugs and Chemicals

nephrotoxicity of		Tubulointerstitial Nephritis: Other heavy metals

poisoning with		Guidelines for Chelation Therapy Symptoms and Treatment of Specific Poisons

Meropenem		Usual Doses of Commonly Prescribed Antibiotics β-Lactams: Other β-Lactams

in meningitis		Acute Bacterial Meningitis: Antibiotics Common IV Antibiotic Dosages for Bacterial Meningitis*

MERRF (myoclonic epilepsy with ragged-red fibers)		Mitochondrial Oxidative Phosphorylation Disorders: Myoclonic epilepsy with ragged-red fibers (MERRF) Mitochondrial Disorders

Merthiolate poisoning		Symptoms and Treatment of Specific Poisons

Mesalamine		Inflammatory Bowel Disease (IBD): 5-Aminosalicylic acid (5-ASA, mesalamine) Crohn's Disease: Mild to moderate disease Ulcerative Colitis: Mild left-sided disease

Mesangiocapillary glomerulonephritis		Electron microscopic features in immunologic glomerular disorders. Nephritic and Nephrotic Syndromes: Membranoproliferative Glomerulonephritis

Mescaline		Hallucinogens

Mesenteric artery occlusion		Acute Mesenteric Ischemia Causes of Acute Mesenteric Ischemia Abdominal Aortic Branch Occlusion

in neonate		Miscellaneous Surgical Emergencies in Neonates: Mesenteric arterial occlusion

Mesna		Protocol for Chemotherapy With Cyclophosphamide and IV Mesna

cyclophosphamide and		Vasculitis: Induction of remission

Mesomelic dysplasia		Types of Osteochondrodysplastic Dwarfism

Mesoridazine

in elderly		High-Risk Drugs in the Elderly (Based on the Beers Criteria)

poisoning with		Symptoms and Treatment of Specific Poisons

Mesothelioma		Asbestos-Related Disorders: Mesothelioma Cardiac Tumors: Malignant primary tumors Cardiac Tumors: Symptoms and Signs

Metabolic acidosis		see Acidosis, metabolic

Metabolic alkalosis		see Alkalosis, metabolic

Metabolic equivalents		Cardiovascular Rehabilitation Endurance Exercises and Their Metabolic Requirement

Metabolic syndrome		Metabolic Syndrome Criteria Often Used for Diagnosis of Metabolic Syndrome* Hypertension: Diuretics Atherosclerosis: Risk Factors

Metabolism

inherited disorders of		see also specific disorders Inherited Disorders of Metabolism

Metacarpal fracture		Fractures: Metacarpal neck fractures (except thumb)

Metacarpophalangeal joints

range of motion of		Normal Values for Range of Motion of Joints*

Metachromatic leukodystrophy		Lysosomal Storage Disorders Lysosomal Storage Disorders: Metachromatic Leukodystrophy

Metaldehyde poisoning		Symptoms and Treatment of Specific Poisons

Metal fume fever		Zinc: Toxicity

Metals

contact dermatitis and		Causes of Allergic Contact Dermatitis

hyperpigmentation and		Hyperpigmentation: Drug-induced hyperpigmentation Hyperpigmentation Effects of Some Drugs and Chemicals

Metamorphopsia		Evaluation of the Ophthalmologic Patient: Visual field testing

Metanephrines		Pheochromocytoma: Blood tests

Metaphyseal chondrodysplasia		Types of Osteochondrodysplastic Dwarfism

Metaphyseal dysplasia		Osteopetroses: Metaphyseal dysplasia (Pyle's disease)

Metaplasia

gastric		Gastritis: Metaplasia

intestinal		Gastritis: Metaplasia

Metapneumovirus infection		Community-Acquired Pneumonia in Children Respiratory Syncytial Virus (RSV) and Human Metapneumovirus Infections

Metastases		see also names and sites of specific cancers Cellular and Molecular Basis of Cancer: Tumor Growth and Metastasis

adrenal		Lung Carcinoma: Metastases

bone		Metastatic Bone Tumors Lung Carcinoma: Metastases

brain		Lung Carcinoma: Metastases

cardiac		Cardiac Tumors: Metastatic tumors Cardiac Tumors: Symptoms and Signs

esophageal		Esophageal Cancer: Other malignant tumors

hepatic		Colorectal Cancer: Surgery Metastatic Liver Cancer Lung Carcinoma: Metastases

neutropenia with		Neutropenia: Secondary neutropenia

orbital		Tumors of the Orbit: Adults

pain with		Clinical Sequelae of Cancer

renal		Metastatic Renal Cancer

resection of		Modalities of Cancer Therapy: Resection of metastases

spinal cord compression with		Clinical Sequelae of Cancer

of unknown primary origin		Metastatic Carcinoma of Unknown Primary Origin

Metastasis

to choroid		Cancers Affecting the Retina: Choroidal metastases

Metatarsal fracture		Fractures: Fractures of the 2nd metatarsal bone base with dislocation (Lisfranc's fracture-dislocation) Stress Fractures

Metatarsalgia		Metatarsalgia

Metatarsophalangeal joints

pain in		Metatarsalgia: Metatarsophalangeal Joint Pain

range of motion of		Normal Values for Range of Motion of Joints*

Metatarsus adductus		Hip, Leg, and Foot Abnormalities: Metatarsus adductus

Metatarsus varus		Hip, Leg, and Foot Abnormalities: Metatarsus varus

Metaxalone		High-Risk Drugs in the Elderly (Based on the Beers Criteria)

Met-enkephalin		Neurotransmission: Endorphins and enkephalins

Metformin		Characteristics of Oral Antihyperglycemics Diabetes Mellitus and Disorders of Carbohydrate Metabolism: Oral antihyperglycemic drugs Diabetes Mellitus and Disorders of Carbohydrate Metabolism: Type 2 Dyslipidemia: Secondary causes

in elderly		Drug Categories of Concern in the Elderly: Antihyperglycemics

folate deficiency and		Folate: Etiology and Pathophysiology

nutrient interactions with		Potential Vitamin-Drug Interactions

in ovulation induction		Ovulatory Dysfunction: Treatment

poisoning with		Symptoms and Treatment of Specific Poisons

in polycystic ovary syndrome		Polycystic Ovary Syndrome: Treatment

vitamin B₁₂ deficiency and		Potential Vitamin-Drug Interactions

Methacholine challenge test		Airflow, Lung Volumes, and Flow-Volume Loop: Obstructive disorders Asthma and Related Disorders: Pulmonary function tests Occupational Asthma: Diagnosis

Methadone		Opioid Analgesics Equianalgesic Doses of Opioid Analgesics*

in dying patient		Symptom Control in the Dying: Pain

poisoning with		Symptoms and Treatment of Specific Poisons

withdrawal from		Opioids: Withdrawal

Methamphetamines

abuse of		Amphetamines

in elderly		Drug-Disease Interactions in the Elderly

in narcolepsy		Narcolepsy: Treatment

overdose of		Amphetamines: Toxicity or overdose Amphetamines: Toxicity or overdose

poisoning with		Symptoms and Treatment of Specific Poisons

tooth decay and		Xerostomia : Drugs

withdrawal from		Amphetamines: Withdrawal

Methane

intestinal production of		Gas-Related Complaints: Excessive flatus

Methanol

antidote for		Common Specific Antidotes

poisoning with		Symptoms and Treatment of Specific Poisons

Methazolamide		Drugs Used to Treat Glaucoma

Methemoglobin, antidote for		Common Specific Antidotes

Methemoglobinemia		Measurement of Gas Exchange: Methemoglobinemia

Methicillin

staphylococcus resistance to		Staphylococcal Infections: Antibiotic resistance Antibiotic Treatment of Staphylococcal Infections in Adults

Methicillin-resistant Staphylococcus aureas (MRSA)		Cellulitis: Etiology

Methidathion poisoning		Symptoms and Treatment of Specific Poisons

Methimazole

in hyperthyroidism		Hyperthyroidism: Propylthiouracil and methimazole

in pregnancy		Thyroid Disorders in Pregnancy: Graves' disease Drugs With Adverse Effects During Pregnancy

Methiocarb poisoning		Symptoms and Treatment of Specific Poisons

Methionine		Nutrition: General Considerations: Proteins

metabolic disorders of		Disorders of Amino Acid and Organic Acid Metabolism Amino Acid and Organic Acid Metabolism Disorders: Disorders of Methionine Metabolism

Methionine synthase deficiency		Amino Acid and Organic Acid Metabolism Disorders: Other forms of homocystinuria

Methionine synthase reductase deficiency		Amino Acid and Organic Acid Metabolism Disorders: Other forms of homocystinuria

Methocarbamol, in elderly		High-Risk Drugs in the Elderly (Based on the Beers Criteria)

Methohexital		Airway Establishment and Control: Sedation and analgesia

Methomyl poisoning		Symptoms and Treatment of Specific Poisons

Methotrexate

in ankylosing spondylitis		Seronegative Spondyloarthropathies: Treatment

in asthma		Asthma and Related Disorders: Drug therapy

in atopic dermatitis		Atopic Dermatitis: Other therapies

in cancer therapy		Commonly Used Antineoplastic Drugs

during breastfeeding		Some Drugs Contraindicated for Breastfeeding Mothers

in ectopic pregnancy		Ectopic Pregnancy: Methotrexate

folate deficiency and		Potential Vitamin-Drug Interactions Folate: Etiology and Pathophysiology

in inflammatory bowel disease		Inflammatory Bowel Disease (IBD): Immunomodulating drugs Crohn's Disease: Moderate to severe disease

in juvenile idiopathic arthritis		Juvenile Idiopathic Arthritis (JIA): Treatment

in myositis		Polymyositis and Dermatomyositis: Treatment

poisoning with		Symptoms and Treatment of Specific Poisons

in psoriasis		Psoriasis: Systemic treatments

in relapsing polychondritis		Relapsing Polychondritis: Treatment

in sarcoidosis		Sarcoidosis: Treatment

in Takayasu's arteritis		Takayasu's Arteritis: Drugs

teratogenicity of		Cancer in Pregnancy Drugs With Adverse Effects During Pregnancy

Methotrexate in rheumatoid arthritis		Other Drugs Used to Treat RA Joint Disorders: Traditional DMARDs

Methoxychlor poisoning		Symptoms and Treatment of Specific Poisons

Methyclothiazide		Oral Diuretics for Hypertension

2-Methylacyl-CoA racemase deficiency		Disorders of Fatty Acid, Very Long-Chain Fatty Acid, and Glycerol Metabolism

Methyl alcohol poisoning		Symptoms and Treatment of Specific Poisons

2-Methylbutyryl glycinuria		Disorders of Amino Acid and Organic Acid Metabolism

Methylcellulose

in constipation		Agents Used to Treat Constipation Constipation: Types of laxatives Treatment of Constipation

3-Methylcrotonyl-CoA carboxylase deficiency		Disorders of Amino Acid and Organic Acid Metabolism

Methyldopa		Adrenergic Modifiers for Hypertension Hypertension: Adrenergic modifiers

in elderly		High-Risk Drugs in the Elderly (Based on the Beers Criteria)

Methylene blue		Common Specific Antidotes

Methylenedioxymethamphetamine (MDMA, Ecstasy)		Amphetamines: Methylenedioxymethamphetamine (Ecstasy, MDMA)

Methylenetetrahydrofolate reductase deficiency		Disorders of Amino Acid and Organic Acid Metabolism

Methylergonovine		Postpartum Hemorrhage: Treatment

3-Methylglutaconic aciduria		Disorders of Amino Acid and Organic Acid Metabolism

Methylmalonate/malonate semialdehyde dehydrogenase deficiency		Disorders of Amino Acid and Organic Acid Metabolism

Methylmalonic acid		Vitamin B₁₂: Diagnosis

excess levels of		Disorders of Amino Acid and Organic Acid Metabolism Amino Acid and Organic Acid Metabolism Disorders: Methylmalonic acidemia

Methylmalonic acidemia-homocystinuria		Disorders of Amino Acid and Organic Acid Metabolism

Methylmalonic acidemia-homocystinuria-megaloblastic anemia		Disorders of Amino Acid and Organic Acid Metabolism

N'-Methylnicotinamide		Niacin: Diagnosis

Methylparaben, allergy to		Lacerations: Local anesthesia

Methyl parathion poisoning		Symptoms and Treatment of Specific Poisons

Methylphenidate		Treatment of Pain: Adverse effects

in attention-deficit/hyperactivity disorder		Learning and Developmental Disorders: Drugs

in dying patient		Symptom Control in the Dying: Depression

in elderly		Drug-Disease Interactions in the Elderly

in narcolepsy		Narcolepsy: Treatment

Methylprednisolone

in asthma		Drug Treatment of Chronic Asthma* Drug Treatment of Asthma Exacerbations* Asthma and Related Disorders: Treatment of acute exacerbation

in COPD		Chronic Obstructive Pulmonary Disease and Related Disorders: Drug therapy

in Goodpasture's syndrome		Goodpasture's Syndrome : Treatment

in IgA nephropathy		Nephritic Syndrome: Corticosteroids and immunosuppressants

in inflammatory bowel disease		Inflammatory Bowel Disease (IBD): Corticosteroids

in membranous nephropathy		Nephrotic Syndrome: Immunosuppressive therapy

in rapidly progressive glomerulonephritis		Nephritic Syndrome: Treatment

in SLE		Systemic Lupus Erythematosus (SLE): Severe disease

in spinal trauma		Spinal Trauma: Immediate care

in vasculitic disorders		Vasculitis: Induction of remission

Methyl salicylate poisoning		Aspirin and Other Salicylate Poisoning

Methyltestosterone

in elderly		High-Risk Drugs in the Elderly (Based on the Beers Criteria)

Methylxanthines

in asthma		Drug Treatment of Chronic Asthma* Asthma and Related Disorders: Drug therapy

in COPD		Chronic Obstructive Pulmonary Disease and Related Disorders: Drug therapy

in pediatric ventilation		Respiratory Support in Neonates and Infants: Mechanical ventilation

Metipranolol		Drugs Used to Treat Glaucoma

Metoclopramide		Management of Adverse Effects of Cancer Therapy: Nausea and Vomiting

during breastfeeding		Some Drugs Contraindicated for Breastfeeding Mothers

in elderly		Effect of Aging on Drug Metabolism* and Elimination Effect of Aging on Drug Response Drug-Disease Interactions in the Elderly

in hiccups		Hiccups: Treatment

in migraine		Migraine: Severe attacks

in pregnancy		Suggested Drugs for Nausea and Vomiting During Early Pregnancy

Metolazone		Oral Diuretics for Hypertension

Metoprolol

in aortic dissection		Aortic Dissection: Treatment

in arrhythmias		Antiarrhythmic Drugs (Vaughan Williams Classification)

in coronary artery disease		Drugs for Coronary Artery Disease

in hypertension		Oral β -Blockers for Hypertension

in migraine		Drugs for Migraine and Cluster Headaches*

Metric system		Metric System

Metronidazole		Usual Doses of Commonly Prescribed Antibiotics Metronidazole Some Clinical Uses of Metronidazole

in amebiasis		Amebiasis: Treatment

in Clostridium difficile-induced diarrhea		Clostridium difficile–Induced Diarrhea: Treatment

in Crohn's disease		Inflammatory Bowel Disease (IBD): Antibiotics and probiotics

during breastfeeding		Some Drugs Contraindicated for Breastfeeding Mothers

in giardiasis		Giardiasis: Treatment

neonatal dosage of		Recommended Dosages of Selected Parenteral Antibiotics for Neonates

in pregnancy		Infectious Disease in Pregnancy: Antibacterials

in trichomoniasis		Trichomoniasis: Treatment

Metrorrhagia		Vaginal Bleeding Dysfunctional Uterine Bleeding (DUB): Symptoms and Signs

Metyrapone		Cushing's Syndrome: Treatment

Meunier-Kuhn syndrome		Factors Predisposing to Bronchiectasis

Mevalonic aciduria		Disorders of Amino Acid and Organic Acid Metabolism

Mexiletine

in arrhythmias		Antiarrhythmic Drugs (Vaughan Williams Classification)

in pain		Drugs for Neuropathic Pain

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