Patients & CaregiversHealthcare ProfessionalsWorldwide
HomeAbout MerckProductsNewsroomInvestor RelationsCareersResearchLicensingThe Merck Manuals
THE MERCK MANUAL MEDICAL LIBRARY: The Merck Manual of Medical Information--Home Edition
Tips for better results
ABCDEFGHI
JKLMNOPQR
STUVWXYZ
Sections
Resources
Index
naneninonsnuny
Type in the first few letters of a word to get there faster:
Go

Ne

Near drowning

Near Drowning

Nearsightedness (myopia)

Symptoms: Refractive Error
Understanding RefractionFigures
Refractive Disorders: Causes

  • in children

  • Refractive Errors in ChildrenSidebar

    Near-syncope

    Symptoms: Light-Headedness and Fainting

    Nebulizer

  • in allergy

  • Allergic Reactions: Cromolyn

  • in asthma

  • Asthma: Short-acting Beta-adrenergic Agonists
    Asthma: Prognosis, Prevention, and Treatment

  • in COPD

  • Chronic Obstructive Pulmonary Disease (COPD): Treatment of Symptoms

    Necator americanus infection (hookworm)

    Hookworm Infection
    Life Cycle of the HookwormFigures

    Neck

  • lump in

  • Finding a Lump in the NeckSidebar

  • in children

  • Neck Masses

  • in thyroid cancer

  • Cancer

  • spasms of

  • Dystonia: Focal and Segmental Dystonias

  • spinal cord compression at

  • Cervical Spondylosis

  • stiff, in meningitis

  • Acute Bacterial Meningitis: Symptoms

  • umbilical cord around

  • Fetus or Newborn Problems: Nuchal Cord

    Necrolysis, toxic epidermal

    Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis

    Necrolytic migratory erythema

    Pancreatic Endocrine Tumors: Symptoms and Diagnosis

    Necrosis

  • avascular

  • Avascular Necrosis of the Bone
    Causes of Avascular NecrosisSidebar

  • in decompression sickness

  • Decompression Sickness: Symptoms

  • of lunate bone (Kienböck's disease)

  • Kienböck's Disease

  • fat, in newborn

  • Physical Examination

  • of kidneys

  • Renal Cortical Necrosis

  • skin

  • Necrotizing Skin Infections

    Necrotizing cellulitis

    Necrotizing Skin Infections

    Necrotizing enterocolitis

    Necrotizing Enterocolitis

    Necrotizing fasciitis

    Streptococcal Infections: Treatment
    Necrotizing Skin Infections

    Necrotizing pancreatitis

    Acute Pancreatitis: Complications

    Necrotizing sialometaplasia

    Mouth Sores: Other causes

    Nedocromil

    Asthma: Cromolyn and Nedocromil
    Drugs Used to Treat AsthmaTables
    Asthma: Prognosis, Prevention, and Treatment

    Needle biopsy

    see Biopsy

    Needlestick injury

    Human Immunodeficiency Virus (HIV) Infection: Transmission of Infection
    Human Immunodeficiency Virus (HIV) Infection: Prevention

    Negativistic personality

    Personality Disorders: Passive-Aggressive (Negativistic) Personality

    Neglect, child

    Child Neglect and Abuse

  • information resources on

  • Ca - Cy

    Neisseria infection

    Other Bacterial InfectionsTables

  • conjunctivitis

  • Conjunctivitis

  • of newborn

  • Some Infections of NewbornsTables

  • gonorrhea

  • Gonorrhea
    Some Vaginal InfectionsTables

  • meninges

  • Acute Bacterial Meningitis: Causes

  • in traveler

  • Problems at the Destination: Sexually Transmitted Diseases

  • urethra

  • Urethritis: Causes

    Nelfinavir

    Drugs For HIV InfectionTables

    Nelson's syndrome

    What Is Nelson's Syndrome?Sidebar

    Neobladder, orthotopic

    Bladder Cancer: Treatment

    Neomycin

    AntibioticsTables

    Neonatal intensive care unit

    What Is a Neonatal Intensive Care Unit?Sidebar

    Neonatal wet-lung syndrome

    Transient Tachypnea

    Neonate

    see Infants

    Nephritic syndrome

    Glomerulonephritis (Nephritic Syndrome)
    Secondary Causes of GlomerulonephritisSidebar
    Primary Glomerular Disorders That Can Cause Glomerulonephritis Tables

    Nephritis

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

  • hereditary (Alport's syndrome)

  • Glomerulonephritis (Nephritic Syndrome): Hereditary Nephritis (Alport's Syndrome)

  • tubulointerstitial

  • Tubulointerstitial Nephritis
    Secondary Causes of Tubulointerstitial NephritisSidebar

    Nephroblastoma

    Wilms' Tumor

    Nephrogenic diabetes insipidus

    Nephrogenic Diabetes Insipidus
    Central Diabetes Insipidus: Symptoms and Diagnosis

    Nephrolithiasis

    Stones in the Urinary Tract

    Nephronophthisis

    Nephronophthisis–Medullary Cystic Disease Complex

    Nephrons

    Viewing the Urinary TractFigures
    Kidneys
    Kidney's Blood SupplyFigures

  • inflammation of

  • see Glomerulonephritis; Nephritis

    Nephrosclerosis, malignant

    Malignant Hypertensive Nephrosclerosis

    Nephrotic syndrome

    Symptoms: Causes
    Glomerulonephritis (Nephritic Syndrome): Nail-Patella Syndrome
    Nephrotic Syndrome
    Secondary Causes of Nephrotic SyndromeSidebar
    Primary Glomerular Disorders That Can Cause Nephrotic Syndrome Tables

  • congenital and infantile

  • Primary Glomerular Disorders That Can Cause Nephrotic Syndrome Tables

    Nephroureterectomy

    Renal Pelvis and Ureter Cancer: Treatment

    Nerve

    see also Brain; Nervous system

  • in acromegaly

  • Acromegaly and Gigantism: Symptoms

  • alcohol injection into

  • Trigeminal Neuralgia: Treatment

  • biology of

  • Nerves
    Typical Structure of a Nerve CellFigures

  • cranial

  • Nerves: Cranial and Spinal Nerves

  • disorders of

  • Cranial Nerve Disorders
    Taking the Pressure Off a NerveFigures

  • testing of

  • Physical Examination: Cranial Nerves
    Testing Cranial Nerves Tables

  • disorders of

  • see also Neuropathy
    Peripheral Nerve Disorders

  • electrical injury to

  • Electrical Injuries: Symptoms

  • inflammation of

  • see Neuritis

  • injury to, in newborn

  • Birth Injury: Nerve Injury

  • in leprosy

  • Leprosy

  • motor

  • Nerves: Cranial and Spinal Nerves

  • hereditary neuropathy of

  • Hereditary Neuropathies

  • testing of

  • Physical Examination: Motor and Sensory Nerves

  • in multiple sclerosis

  • Multiple Sclerosis (MS)
    Common Symptoms of Multiple Sclerosis Tables

  • in muscle stimulation disorders

  • Muscle Stimulation Disorders

  • myelin sheath of

  • Multiple Sclerosis (MS) and Related Disorders
    Insulating a Nerve FiberFigures

  • disorders of

  • Multiple Sclerosis (MS) and Related Disorders
    Common Symptoms of Multiple Sclerosis Tables

  • at neuromuscular junction

  • Neuromuscular Junction Disorders

  • in neuropathy

  • see Neuropathy

  • pain and

  • see Neuralgia

  • palsy of

  • see Palsy

  • peripheral

  • Nerves
    Using the Brain to Move a MuscleFigures

  • disorders of

  • Peripheral Nerve Disorders
    Overactive Nerves: Two SyndromesSidebar
    When the Foot's AsleepSidebar

  • plexuses of

  • Nerves: Cranial and Spinal Nerves
    Plexus Disorders
    Nerve Junction Boxes: The PlexusesFigures

  • radiation injury to

  • Radiation Damage

  • sensory

  • Nerves: Cranial and Spinal Nerves

  • hereditary neuropathy of

  • Hereditary Neuropathies

  • testing of

  • Physical Examination: Motor and Sensory Nerves

  • in skin

  • Getting Under the SkinFigures
    Structure and Function: Dermis

  • spinal

  • see also Spinal cord
    How the Spine Is OrganizedFigures
    Nerves: Cranial and Spinal Nerves
    Spinal Cord Disorders

  • tests of

  • Diagnosis: Nerve Tests
    Testing Cranial Nerves Tables
    Diagnostic Procedures Tables

    Nerve block

    Treatment: Anesthetics

  • in labor and delivery

  • Labor: Pain Relief

    Nerve cell (neuron)

    Biology of the Nervous System
    Brain
    Nerves
    Typical Structure of a Nerve CellFigures
    Peripheral Nerve Disorders

  • age-associated changes in

  • Effects of Aging: Brain

    Nerve conduction study

    Diagnosis: Nerve Tests
    Procedures: Electromyography and Nerve Conduction Studies

    Nerve roots

    How the Spine Is OrganizedFigures
    Nerves: Cranial and Spinal Nerves
    Spinal Cord Disorders
    To and From and Up and Down the Spinal CordFigures

  • compression of

  • Compression of the Spinal Cord
    A Herniated DiskFigures
    Low Back Pain: Symptoms and Types of Low Back Pain
    Low Back Pain: Treatment

  • dermatomes of

  • DermatomesFigures

    Nerves

  • spinal

  • To and From and Up and Down the Spinal CordFigures

    Nervousness

    see Anxiety

    Nervous system

    see also Nerve(s)
    Major Organ Systems Tables
    Biology of the Nervous System
    Viewing the BrainFigures
    How the Spine Is OrganizedFigures
    Typical Structure of a Nerve CellFigures

  • age-associated changes in

  • Changes in the Body: Brain and Nervous System
    Effects of Aging

  • assessment of

  • Diagnosis of Brain, Spinal Cord, and Nerve Disorders
    What Is a Neurologic Symptom?Sidebar
    Mental Status TestingTables
    Reflex Arc: A No-BrainerFigures
    How a Spinal Tap Is DoneFigures

  • autonomic

  • see also Autonomic nervous system
    Organ Systems
    Nerves: Autonomic Nervous System
    Autonomic Nervous System Disorders: Anatomy

  • in blood pressure control

  • High Blood Pressure: The Body's Control of Blood Pressure

  • disorders of

  • Autonomic Nervous System Disorders
    Some Drugs Used to Treat Symptoms of Autonomic DisordersTables

  • testing of

  • Physical Examination: Autonomic Nervous System

  • central

  • see Brain; Central nervous system; Spinal cord

  • peripheral

  • see also Peripheral nerves
    Nerves

  • radiation injury to

  • Radiation Damage

  • somatic

  • Nerves: Somatic Nervous System

  • tumors of

  • Tumors of the Nervous System
    Tumors That Originate in or Near the Brain Tables
    Common Symptoms of Some Brain TumorsSidebar
    Understanding Tumor TreatmentSidebar
    Tumors That Originate in or Near the Spinal Cord Tables

  • in children

  • Neuroblastoma

    Netilmicin

    AntibioticsTables

    Neuralgia

  • in ankle sprain

  • Ankle Sprain: Complications

  • glossopharyngeal

  • Glossopharyngeal Neuralgia

  • postherpetic

  • Types: Postherpetic Neuralgia
    What Is Postherpetic Neuralgia?Sidebar

  • trigeminal

  • Trigeminal Neuralgia
    Taking the Pressure Off a NerveFigures

    Neural tube defects

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

  • folic acid deficiency and

  • Birth Defects: Nutrition

  • prenatal testing for

  • Prenatal Diagnostic Testing: Neural Tube Defects
    Interpreting Abnormal Alpha-Fetoprotein LevelsSidebar

    Neurinoma, acoustic

    Auditory Nerve Tumors

    Neuritis

  • brachial

  • Plexus Disorders: Causes

  • optic

  • Optic Neuritis

  • in multiple sclerosis

  • Multiple Sclerosis (MS): Symptoms

    Neuroblastoma

    Neuroblastoma

  • paraneoplastic syndromes in

  • What Are Paraneoplastic Syndromes?Sidebar

    Neurodermatitis (localized scratch dermatitis)

    Dermatitis: Localized Scratch Dermatitis

    Neuroendovascular surgery

    Hemorrhagic Stroke: Treatment

    Neurofibroma, small intestine

    Small Intestine Tumors That Are Noncancerous

    Neurofibromatosis

    Neurofibromatosis

  • pheochromocytoma in

  • Pheochromocytoma

    Neurogenic bladder

    Urinary Incontinence: Overflow Incontinence

    Neuroleptic malignant syndrome

    What Is Neuroleptic Malignant Syndrome?Sidebar
    Schizophrenia: Antipsychotic Drugs

    Neurologic examination

    Diagnosis of Brain, Spinal Cord, and Nerve Disorders
    What Is a Neurologic Symptom?Sidebar
    Mental Status TestingTables
    Reflex Arc: A No-BrainerFigures

    Neuroma

  • acoustic

  • Auditory Nerve Tumors

  • Morton's

  • Foot Pain: Pain Caused by Damage to the Nerves in the Foot

  • in multiple endocrine neoplasia

  • Multiple Endocrine Neoplasia Syndromes: Type 2B Disease

    Neuromuscular junction

    Neuromuscular Junction Disorders

  • disorders of

  • Neuromuscular Junction Disorders

    Neuron (nerve cell)

    Biology of the Nervous System
    Brain
    Nerves
    Typical Structure of a Nerve CellFigures
    Peripheral Nerve Disorders

  • age-associated changes in

  • Effects of Aging: Brain

    Neuronitis, vestibular

    Vestibular Neuronitis

    Neuropathic pain

    Types: Neuropathic Pain

    Neuropathy

    Multiple Mononeuropathy

  • autonomic

  • Autonomic Neuropathies

  • in cancer

  • What Are Paraneoplastic Syndromes?Sidebar

  • in diabetes

  • Polyneuropathy: Causes
    Diabetes Mellitus (DM): Complications
    Long-Term Complications of Diabetes Tables

  • hereditary

  • Hereditary Neuropathies

  • inflammatory demyelinating (Guillain-Barré syndrome)

  • Polyneuropathy: Guillain-Barré Syndrome

  • in Lyme disease

  • Lyme Disease: Symptoms

  • multiple-nerve (polyneuropathy)

  • Polyneuropathy

  • optic

  • Optic Neuropathy

  • Leber's hereditary

  • Other Primary Demyelinating Diseases

  • single-nerve (mononeuropathy)

  • Mononeuropathy
    When the Foot's AsleepSidebar

  • in vitamin B12 deficiency

  • Vitamin B12: Symptoms

    Neurosyphilis

    Syphilis: Symptoms

    Neurotoxins

    Neuromuscular Junction Disorders: Botulism
    Chemical Food Poisoning: Shellfish Poisoning

    Neurotransmitters

    Biology of the Nervous System

    Neutropenia

    Neutropenia

  • with cancer treatment

  • Chemotherapy: Low Blood Cell Counts

    Neutrophil(s)

    Components of Blood: White Blood Cells
    Understanding the Immune SystemSidebar
    Nonspecific Immunity: Neutrophils

  • in chronic granulomatous disease

  • Chronic Granulomatous Disease

  • high levels of (leukocytosis)

  • Neutrophilic Leukocytosis

  • in hyperimmunoglobulinemia E syndrome

  • Hyperimmunoglobulinemia E Syndrome

  • in infection

  • Defenses Against Infection: The Blood

  • low levels of (neutropenia)

  • Neutropenia

  • with cancer treatment

  • Chemotherapy: Low Blood Cell Counts

    Neutrophilic leukocytosis

    Neutrophilic Leukocytosis

    Nevi (moles)

    Moles
    Melanoma: Diagnosis, Treatment, and Prevention

    Nevi flammeus

    Growths and Malformations of the Vessels: Port-wine Stains

    Nevirapine

    Drugs For HIV InfectionTables

    Newborn

    see also Infants

  • abdominal pain in

  • Abdominal Pain in Newborns, Infants, and Young ChildrenTables

  • birth defects in

  • Birth Defects
    Other Birth DefectsTables
    Patent Ductus Arteriosus: Failure to CloseFigures
    Septal Defect: A Hole in the Heart's WallFigures
    Tetralogy of Fallot: Four Defects