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Lab Results Labetalol for high blood pressure during pregnancy Labor Trial After a Previous Cesarean Delivery, Deciding About Labor, Delivery, and Postpartum Period Labyrinthitis Lacerations (Cuts) Lactation Mastitis Lactic acid dehydrogenase (LDH) Lactose Intolerance Laetrile/Amygdalin: Complementary and alternative medicine - Health Professional Information [NCI PDQ] Laetrile/Amygdalin: Complementary and alternative medicine - Patient Information [NCI PDQ] Lamotrigine for epilepsy Language Development Lap band surgery Laparoscopic gallbladder surgery for gallstones Laparoscopic inguinal hernia repair Laparoscopic ovarian drilling (ovarian diathermy) for PCOS Laparoscopic surgery for endometriosis Laryngeal cancer: Treatment - Health Professional Information [NCI PDQ] Laryngeal cancer: Treatment - Patient Information [NCI PDQ] Laryngitis Laryngotracheobronchitis Laser Epithelial Keratomileusis (LASEK) Laser in-situ keratomileusis for farsightedness (H-LASIK) Laser iridotomy for glaucoma Laser photocoagulation for age-related macular degeneration Laser photocoagulation for diabetic retinopathy Laser resurfacing Laser Surgery for Abnormal Cervical Cell Changes Laser surgery for genital warts Laser Surgery for Nearsightedness, Deciding About Laser surgery for warts Laser trabeculoplasty for glaucoma Laser treatment for varicose veins LASIK (laser in-situ keratomileusis) for nearsightedness Last Days and Hours of Life: Supportive care - Health Professional Information [NCI PDQ] Late Effects of Treatment for Childhood Cancer: Treatment - Health Professional Information [NCI PDQ] Late Effects of Treatment for Childhood Cancer: Treatment - Patient Information [NCI PDQ] Latex Allergy Laxatives Lazy Eye (Amblyopia) Lead Poisoning Lead Poisoning, Chelating Agents for Learning to Talk Leflunomide for rheumatoid arthritis Leg Cramps, Nocturnal Leg Injuries Leg Problems, Noninjury Leucovorin Leukemia Leukemia, acute lymphoblastic, adult: Treatment - Health Professional Information [NCI PDQ] Leukemia, acute lymphoblastic, adult: Treatment - Patient Information [NCI PDQ] Leukemia, acute lymphoblastic, childhood: Treatment - Health Professional Information [NCI PDQ] Leukemia, acute lymphoblastic, childhood: Treatment - Patient Information [NCI PDQ] Leukemia, acute myeloid, adult: Treatment - Health Professional Information [NCI PDQ] Leukemia, acute myeloid, adult: Treatment - Patient Information [NCI PDQ] Leukemia, acute myeloid, childhood: Treatment - Health Professional Information [NCI PDQ] Leukemia, acute myeloid, childhood: Treatment - Patient Information [NCI PDQ] Leukemia, Busulfan for Leukemia, Chlorambcil for Leukemia, chronic lymphocytic: Treatment - Health Professional Information [NCI PDQ] Leukemia, chronic lymphocytic: Treatment - Patient Information [NCI PDQ] Leukemia, chronic myelogenous: Treatment - Health Professional Information [NCI PDQ] Leukemia, Cytarabine for Leukemia, Fludarabine for Leukemia, hairy cell: Treatment - Health Professional Information [NCI PDQ] Leukemia, hairy cell: Treatment - Patient Information [NCI PDQ] Leukemia, Radiation Therapy for Leukemia, Rituximab for Leukotriene modifiers for allergic rhinitis Leukotriene pathway modifiers for long-term control of asthma Levels of Evidence for Adult and Pediatric Cancer Treatment Studies: Treatment - Health Professional Information [NCI PDQ] Levels of Evidence for Cancer Treatment Studies: Screening - Health Professional Information [NCI PDQ] Levels of Evidence for Human Studies of Cancer Complementary and Alternative Medicine: Complementary and alternative medicine - Levetiracetam for epilepsy Levodopa medicines for Parkinson's disease LH-RH agonists/GnRH agonists for prostate cancer Lice Lice, Lindane for Lice, Malathion for Lice, Permethrin for Lice, Piperonyl Butoxide and Pyrethrins for Lice, Pyrethrin and Piperonyl Butoxide for Lice, Visual Examination for Life Span and Smoking Calculator Life-Prolonging Treatments at End of Life, Deciding About Light Therapy Light Therapy (Using), For Seasonal Affective Disorder Lightheadedness Lindane 1% for scabies Lindane for lice Lipid Panel Lipoma Liposuction Listeriosis Lithium for cluster headaches Liver cancer, adult primary: Treatment - Health Professional Information [NCI PDQ] Liver cancer, adult primary: Treatment - Patient Information [NCI PDQ] Liver cancer, childhood: Treatment - Health Professional Information [NCI PDQ] Liver cancer, childhood: Treatment - Patient Information [NCI PDQ] Liver Function Panel Liver function tests Liver resection Liver tests for infectious mononucleosis Living Will Living With a Spinal Cord Injury Lizard and Snake Bites Localized Prostate Cancer, Should I Have radiation Therapy or a Prostatectomy? Long-acting beta2-agonists for long-term control of asthma Loop electrosurgical excision procedure (LEEP) for abnormal cervical cell changes Loop electrosurgical excision procedure (LEEP) for genital warts Loss, Grief, and Bereavement: Supportive care - Health Professional Information [NCI PDQ] Loss, Grief, and Bereavement: Supportive care - Patient Information [NCI PDQ] Low Back Pain Low Back Pain (Chronic), Anticonvulsants for Low Back Pain, Acetaminophen for Low Back Pain, Anesthetic or Corticosteroid Injections for Low Back Pain, Deciding About MRI Low Back Pain, Deciding About Spinal Manipulation Low Back Pain, History and Physical Examination for Low Back Pain, IDET (Intradiscal Electrothermic Therapy) for Low Back Pain, Opiate Pain Relievers for Low Back Pain, Tricyclic and Tetracyclic Antidepressants for Low back pain: Exercises to reduce pain 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-Carb Diets for Weight Loss Low-Dose Aspirin Therapy Low-dose vaginal estrogen for dryness and atrophy Lower Leg Injuries Lower Leg Problems, Noninjury Low-molecular-weight heparins for deep vein thrombosis Low-salt diet for cirrhosis, Eating a Low-Salt Diet for Heart Failure Low-salt diets: Eating out Low-Sodium Diet for Heart Failure Lumbar Pain Lumbar Spinal Stenosis Lumbar Spinal Stenosis, Epidural Steroid Injections for Lumpectomy for Breast Cancer Lumpectomy or a Mastectomy to Treat Early-Stage Breast Cancer, Deciding About Lumps Under the Skin Lung Cancer Lung Cancer, History and Physical Examination for Lung Cancer, Medical History and Physical Examination for Lung cancer, non-small cell: Treatment - Health Professional Information [NCI PDQ] Lung cancer, non-small cell: Treatment - Patient Information [NCI PDQ] Lung Cancer, Physical Examination and Medical History for Lung cancer, small cell: Treatment - Health Professional Information [NCI PDQ] Lung cancer, small cell: Treatment - Patient Information [NCI PDQ] Lung cancer: Prevention - Health Professional Information [NCI PDQ] Lung cancer: Prevention - Patient Information [NCI PDQ] Lung cancer: Screening - Health Professional Information [NCI PDQ] Lung cancer: Screening - Patient Information [NCI PDQ] Lung Development (Fetal), Antenatal Corticosteroids for Lung surgery (thoracotomy) for lung cancer Lung transplant for cystic fibrosis Lupus (Systemic Lupus Erythematosus) Lupus, Antimalarial Medications for Lupus, Corticosteroids for Lupus, History and Physical Examination for Lupus, Immunosuppressive Medications for Lupus, Medical History and Physical Examination for Lupus, Physical Examination and Medical History for Lyme Disease Lyme Disease, Antibiotics for Lymph Node Cancer (Non-Hodgkin's Lymphoma) Lymph node removal (lymphadenectomy) for melanoma Lymphadenectomy for endometrial cancer Lymphadenopathy (Swollen Lymph Nodes) Lymphedema Lymphedema: Managing lymphedema Lymphedema: Supportive care - Health Professional Information [NCI PDQ] Lymphedema: Supportive care - Patient Information [NCI PDQ] Lymphoma, non-Hodgkin's, adult: Treatment - Health Professional Information [NCI PDQ] Lymphoma, non-Hodgkin's, adult: Treatment - Patient Information [NCI PDQ] Lymphoma, non-Hodgkin's, childhood: Treatment - Health Professional Information [NCI PDQ] Lymphoma, non-Hodgkin's, childhood: Treatment - Patient Information [NCI PDQ] Lymphoma, Radiation Therapy for