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- Le Merrer Syndrome
- Lead - Medical Test
- Lead Poisoning
- Lead Poisoning in Children: Questions Before Screening
- Lead Poisoning Screening
- Lead Poisoning, Chelating Agents for - Medication
- Lead Poisoning: Contaminated Drinking Water
- Lead Poisoning: Jobs and Hobbies That May Increase Risk
- Lead Poisoning: Nutrition and Food Preparation
- Lead Poisoning: Reducing Lead in Your Home
- Lead Poisoning: Tips for Those Who Work With Lead
- Learning to Talk
- Leber Congenital Amaurosis
- Leber Hereditary Optic Neuropathy
- Leber's Disease
- Leber's Optic Atrophy
- Leber's Optic Neuropathy (LHON)
- Leflunomide for Rheumatoid Arthritis - Medication
- Leg Cramps at Night
- Leg Cramps During Pregnancy
- Leg Injuries
- Leg Problems, Non-Injury
- Leg X-Ray - Medical Test
- Legg Calve Perthes Disease
- Legionellosis
- Legionnaires' Disease
- Legionnaires' Disease and Pontiac Fever
- Leigh Necrotizing Encephalopathy
- Leigh's Disease
- Leigh's Syndrome
- Leiner Disease
- Leiner-Moussous Desquamative Erythroderma
- Leiomyosarcoma of the Uterus
- Leiomyosarcoma, General
- Leiomyosarcoma, Inferior Vena Cava
- Lejeune syndrome
- LEMS
- Lennox-Gastaut Syndrome
- Lens Opacities
- Lenticular Degeneration, Progressive
- lentigines, atrial myxoma, and blue nevi (LAMB) syndrome
- Lenz Dysmorphogenetic Syndrome
- Lenz Dysplasia
- Lenz Microphthalmia Syndrome
- Lenz Syndrome
- LEOPARD Syndrome
- Leprechaunism
- Leprosy
- Leptomeningeal Angiomatosis
- Leptomeningioma
- Leptospiral Jaundice
- Leptospirosis
- Leri Pleonosteosis
- Leri-Weil Dyschondrosteosis
- Leri-Weil Syndrome
- Leri-Weill Disease
- Leriche's Syndrome
- Lermoyez Syndrome
- Leroy Disease
- Lesch Nyhan Syndrome
- Lesch-Nyhan disease
- Letterer-Siwe Disease
- Leucovorin - Medication
- Leukemia
- Leukemia, Busulfan for - Medication
- Leukemia, Chlorambcil for - Medication
- Leukemia, Chronic Lymphocytic
- Leukemia, Chronic Myelogenous
- Leukemia, Cytarabine for - Medication
- Leukemia, Fludarabine for - Medication
- Leukemia, Hairy Cell
- Leukemia, Radiation Therapy for
- Leukemia, Rituximab for - Medication
- Leukemic Reticuloendotheliosis
- Leukocyte Adhesion Deficiency Syndromes
- Leukocytic Anomaly Albinism
- Leukocytic Inclusions with Platelet Abnormality
- Leukocytoclastic Vasculitis
- Leukoderma
- Leukodystrophy
- Leukodystrophy with Rosenthal Fibers
- Leukodystrophy, Globoid Cell
- Leukodystrophy, Krabbe's
- Leukodystrophy, Metachromatic
- Leukoencephalitis Periaxialis Concentric
- Leukotriene modifiers for allergic rhinitis - Medication
- Leukotriene Pathway Modifiers for Long-Term Control of Asthma - Medication
- Levels of Evidence for Adult and Pediatric Cancer Treatment Studies (PDQ®): Treatment - Health Professional Information [NCI]
- Levels of Evidence for Cancer Genetics Studies (PDQ®): Genetics - Health Professional Information [NCI]
- Levels of Evidence for Cancer Screening and Prevention Studies (PDQ®): Screening - Health Professional Information [NCI]
- Levels of Evidence for Human Studies of Cancer Complementary and Alternative Medicine (PDQ®): Complementary and alternative medicine - Health Professional Information [NCI]
- Levels of Evidence for Supportive and Palliative Care Studies (PDQ®): Supportive care - Health Professional Information [NCI]
- Levetiracetam for epilepsy - Medication
- Levine-Critchley Syndrome
- Levodopa Medicines for Parkinson's Disease - Medication
- Levonorgestrel (LNg) IUD
- Levulosuria
- Levy-Hollister Syndrome
- Levy-Yeboa Syndrome
- Leyden-Moebius Muscular Dystrophy
- Lice
- Lice, Lindane for - Medication
- Lice, Permethrin for - Medication
- Lice, Piperonyl Butoxide and Pyrethrins for - Medication
- Lice, Pyrethrin and Piperonyl Butoxide for - Medication
- Lice, Visual Examination for - Medical Test
- Lice: Cleaning Lice From Combs, Clothing, and Other Items
- Lice: Removing Nits From Hair
- Lichen Acuminatus
- Lichen Annularis
- Lichen Planus
- Lichen Planus Sclerosus Atrophicus
- Lichen Psoriasis
- Lichen Ruber Acuminatus
- Lichen Ruber Planus
- Lichen Sclerosus
- Lichen Sclerosus et Atrophicus
- Lichen Urticatus
- Lidocaine for Cluster Headaches
- Life Span and Smoking Calculator
- Life Transitions and PTSD
- Life-Prolonging Treatments at End of Life, Deciding About
- Lifestyle Changes That May Prevent Cancer
- Light Therapy
- Light Therapy (Using), For Seasonal Affective Disorder
- Lightheadedness
- Limb Body Wall Complex
- Limit Dextrinosis
- Linda's Story: Getting Active When You Have Prediabetes
- Linda's Story: Quitting Smoking Improves Cholesterol
- Lindane 1% for Scabies - Medication
- Lindane for Lice - Medication
- Lindau Disease
- Lingua Fissurata
- Lingua Nigra
- Lingua Plicata
- Lingua Scrotalis
- Lingua Villosa Nigra
- Linguofacial Dyskinesia
- Lip and Oral Cavity Cancer Treatment (PDQ®): Treatment - Health Professional Information [NCI]
- Lip and Oral Cavity Cancer Treatment (PDQ®): Treatment - Patient Information [NCI]
- Lip Pseudocleft-hemangiomatous Branchial Cyst Syndrome
- Lipase - Medical Test
- lipase D deficiency
- LIPD deficiency
- lipid histiocytosis
- Lipid histiocytosis (kerasin type)
- Lipid Panel
- Lipid Profile - Medical Test
- Lipid-Storage Myopathy Associated with SCAD Deficiency
- Lipidosis, ganglioside, infantile
- lipidosis, sphingomyelin
- Lipodystrophy
- Lipodystrophy, partial, with Rieger anomaly and short stature
- Lipoid Granulomatosis
- Lipoma
- Lipomatosis Dolorosa Morbus Dercum's
- Lipomatosis of Pancreas, Congenital
- Lipomucopolysaccharidosis Type I
- Lipoprotein Analysis - Medical Test
- lipoprotein lipase deficiency
- lipoprotein lipase, included; LPL, included
- Liposuction
- Lissencephaly
- lissencephaly, type I
- Listeria Infection
- Listeriosis
- Listeriosis
- Lithium for Cluster Headaches - Medication
- Lithotripsy (ESWL) for Kidney Stones, Deciding About
- Little Disease
- Little Leaguer's Elbow (Medial Apophysitis)
- Livedo Reticularis and Cerebrovascular Accidents
- Liver (Hepatocellular) Cancer Prevention (PDQ®): Prevention - Health Professional Information [NCI]
- Liver (Hepatocellular) Cancer Prevention (PDQ®): Prevention - Patient Information [NCI]
- Liver (Hepatocellular) Cancer Screening (PDQ®): Screening - Health Professional Information [NCI]
- Liver (Hepatocellular) Cancer Screening (PDQ®): Screening - Patient Information [NCI]
- Liver and Spleen Scan - Medical Test
- Liver Biopsy - Medical Test
- Liver fluke disease
- Liver Function Panel
- Liver function tests - Medical Test
- Liver Phosphorylase Deficiency
- Liver Resection
- Liver tests for infectious mononucleosis - Medical Test
- Liver Transplant for Hepatitis B
- Living Organ Donation
- Living Will
- Living Will
- Living With a Spinal Cord Injury
- Living With an Ostomy
- Living With More Than One Health Problem
- Lizard and Snake Bites
- LO-CCHS/HD
- lobar atrophy of the brain
- Lobar Emphysema, Infantile
- Lobar Holoprosencephaly
- Lobar Tension Emphysema in Infancy
- Lobo Disease
- Lobstein Disease (Type I)
- Lobster Claw Deformity
- Lobular Carcinoma of the Minor Salivary Glands
- Local Anesthesia
- Local Anesthesia for Childbirth
- Local Anesthetics
- Localized Infantile Mastocytosis
- Localized Prostate Cancer, Should I Have radiation Therapy or a Prostatectomy?
- Locked In Syndrome
- Lockjaw
- Loeffler Endomyocardial Fibrosis with Eosinophilia
- Loeffler Fibroplastic Parietal Endocarditis
- Loeffler's Disease
- Loken Senior Syndrome
- Long QT Syndrome Type 1
- Long QT Syndrome without Deafness
- Long-Acting Beta2-Agonists for Long-Term Control of Asthma - Medication
- Long-Term Care for Alzheimer's or Other Dementia, Deciding About
- Long-Term Care for Stroke, Deciding About
- Loop Electrosurgical Excision Procedure (LEEP) for Abnormal Cervical Cell Changes
- Loop Electrosurgical Excision Procedure (LEEP) for Genital Warts
- Loralie's Story: It's Never Too Late
- Lorna's Story: There's No Fast Cure
- Losing Weight: Deciding About a Diet Plan
- Lota
- Lou Gehrig's Disease
- Louis-Bar Syndrome
- Low Back Pain
- Low Back Pain (Chronic), Anticonvulsants for - Medication
- Low Back Pain and Sex
- Low Back Pain, Acetaminophen for - Medication
- Low Back Pain, Anesthetic or Corticosteroid Injections for - Medication
- Low Back Pain, History and Physical Examination for - Medical Test
- Low Back Pain, IDET (Intradiscal Electrothermic Therapy) for
- Low Back Pain, Opiate Pain Relievers for - Medication
- Low Back Pain, Tricyclic and Tetracyclic Antidepressants for - Medication
- Low Back Pain: Exercises to Reduce Pain
- Low Back Pain: Should I Have an MRI?
- Low Back Pain: Should I Have Spinal Manipulation?
- Low Back Pain: Should I Try Epidural Steroid Shots?
- Low Blood Pressure (Hypotension)
- Low Blood Sugar
- Low Blood Sugar (Hypoglycemia) in People Without Diabetes
- Low Blood Sugar from Diabetes
- Low blood sugar from taking insulin, Dealing with
- Low blood sugar from taking oral diabetes medicine, Dealing with
- Low blood sugar in children with diabetes, Dealing with
- Low blood sugar in children with diabetes, Preventing
- Low Blood Sugar with Gestational Diabetes, Dealing With
- Low Blood Sugar: Emergency Care for a Child
- Low Density B-lipoprotein Deficiency
- Low Gamma-GT Familial Intrahepatic Cholestasis
- Low Imperforate Anus
- Low Potassium Syndrome
- Low-Carb Diets for Weight Loss
- Low-Density Beta Lipoprotein Deficiency
- Low-Dose ASA Therapy
- Low-Dose Vaginal Estrogen for Dryness and Atrophy - Medication
- Low-Grade Papillary Carcinoma of the Palate
- Low-Lying Placenta
- Low-molecular-weight heparins for deep vein thrombosis - Medication
- Low-Risk Drinking Guidelines
- Low-salt diet for cirrhosis, Eating a
- Low-Salt Diet for Heart Failure
- Low-Salt Diets: Eating Out
- Low-Sodium Diet for Heart Failure
- Low-Vision Accommodations in Your Home
- Low-Vision Aids and Adaptive Technology
- Lowe Syndrome
- Lower Gastrointestinal Series - Medical Test
- Lower Leg Injuries
- Lower Leg Problems, Noninjury
- Lubs Syndrome
- Lues, Acquired
- Lues, Congenital
- Lumbar Canal Stenosis
- Lumbar Pain
- Lumbar Puncture - Medical Test
- Lumbar Spinal Stenosis
- Lumbar Spinal Stenosis
- Lumbar Spinal Stenosis, Epidural Steroid Injections for - Medication
- Lumbosacral Region of the Spine
- Lumbosacral Spinal Stenosis
- Lumpectomy for Breast Cancer
- Lumpectomy or a Mastectomy to Treat Early-Stage Breast Cancer, Deciding About
- Lumps Under the Skin
- Lunatomalacia
- Lung Angiogram - Medical Test
- Lung Biopsy - Medical Test
- Lung Cancer
- Lung Cancer Prevention (PDQ®): Prevention - Health Professional Information [NCI]
- Lung Cancer Prevention (PDQ®): Prevention - Patient Information [NCI]
- Lung Cancer Screening (PDQ®): Screening - Health Professional Information [NCI]
- Lung Cancer Screening (PDQ®): Screening - Patient Information [NCI]
- Lung Cancer, History and Physical Examination for - Medical Test
- Lung Cancer, Medical History and Physical Examination for - Medical Test
- Lung Cancer, Physical Examination and Medical History for - Medical Test
- Lung Development (Fetal), Antenatal Corticosteroids for - Medication
- Lung Function in COPD
- Lung Function Testing, Home - Medical Test
- Lung Function Tests - Medical Test
- Lung Infections and COPD
- Lung Nocardiosis
- Lung Scan - Medical Test
- Lung Surgery (Thoracotomy) for Lung Cancer
- Lung Transplant for COPD
- Lung Transplant for Cystic Fibrosis
- Lupus
- Lupus (Systemic Lupus Erythematosus)
- Lupus and Antiphospholipid Antibody Syndrome
- Lupus and Pregnancy
- Lupus Anticoagulant Syndrome
- Lupus erythematosus
- Lupus, Antimalarial Medications for - Medication
- Lupus, Corticosteroids for - Medication
- Lupus, History and Physical Examination for - Medical Test
- Lupus, Immunosuppressive Medications for - Medication
- Lupus, Medical History and Physical Examination for - Medical Test
- Lupus, Physical Examination and Medical History for - Medical Test
- Lupus: Criteria for Diagnosis
- Lupus: Healthy Eating
- Luschka-Magendie Foramina Atresia
- Luteinizing Hormone - Medical Test
- Lutz-Splendore-Almeida Disease