| L-CPT1 Deficiency | |
| L-Tryptophan Disease | |
| L1 Syndrome | |
LA | |
| La Peste | |
| Lab Results | |
| Laband Syndrome | |
| Labhart-Willi Syndrome | |
| Labor Trial After a Previous Cesarean Delivery, Deciding About | |
| Labor, Delivery, and Postpartum Period | |
| Labyrinthine Positional Nystagmus | |
| Labyrinthitis | |
| Lacerations (Cuts) | |
| Lacrimo-Auriculo-Dento-Digital Syndrome | |
| Lactation Mastitis | |
| Lactation-Uterus Atrophy | |
| lactic and pyruvate acidemia with carbohydrate sensitivity | |
| lactic and pyruvate acidemia with episodic ataxia and weakness | |
| Lactose Intolerance | |
| LADD | |
| LADD Syndrome | |
| Laetrile/Amygdalin: Complementary and alternative medicine - Health Professional Information [NCI PDQ] | |
| Laetrile/Amygdalin: Complementary and alternative medicine - Patient Information [NCI PDQ] | |
| Laki-Lorand Factor Deficiency | |
| LAM | |
| Lambert Type Ichthyosis | |
| Lambert-Eaton Myasthenic Syndrome |  Top |
| Lambert-Eaton Syndrome | |
| lamellar ichthyosis, type 1 and type 2 | |
| Lancefield Group B Streptococcus | |
| Lancereaux-Mathieu-Weil Spirochetosis | |
| Landau Kleffner Syndrome | |
| Langer Giedion Syndrome | |
| Langerhans Cell Histiocytosis | |
| Language Development | |
| Laparoscopic gallbladder surgery for gallstones | |
| Laparoscopic inguinal hernia repair | |
| Laparoscopic ovarian drilling (ovarian diathermy) for PCOS | |
| Laparoscopic surgery for endometriosis | |
| Laron Dwarfism | |
| Laron Syndrome | |
| Laron Type Pituitary Dwarfism I | |
| Larsen Syndrome | |
| Laryngeal cancer: Treatment - Health Professional Information [NCI PDQ] | |
| Laryngeal cancer: Treatment - Patient Information [NCI PDQ] | |
| Laryngeal Dystonia | |
| Laryngeal Papilloma | |
| Laryngitis | |
| Laryngotracheobronchitis | |
| Laser Epithelial Keratomileusis (LASEK) | |
| Laser in-situ keratomileusis for farsightedness (H-LASIK) | |
| Laser iridotomy for glaucoma | Top |
| 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] | |
| Latah (Observed in Malaysia) | |
| 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] | |
| late onset central hypoventilation syndrome with hypothalamic dysfunction | |
| Late-Onset Immunoglobulin Deficiency | |
| Late-Onset Metachromatic Leukodystrophy | |
| Late-onset multiple carboxylase deficiency | |
| Latex Allergy | |
| Launois-Bensaude | |
| Launois-Cleret Syndrome | |
| Laurence Moon Syndrome | |
| Laurence Syndrome | |
| Laxatives | |
| Lazy Eye (Amblyopia) | Top |
LC | |
| LCA | |
| LCAD Deficiency | |
| LCPD | |
LE | |
| Le Jeune Syndrome | |
| Le Merrer Syndrome | |
| Lead Poisoning | |
| Learning to Talk | |
| Leber Hereditary Optic Neuropathy | |
| Leber's Amaurosis | |
| Leber's Congenital Amaurosis | |
| Leber's Congenital Tapetoretinal Degeneration | |
| Leber's Congenital Tapetoretinal Dysplasia | |
| Leber's Disease | |
| Leber's Optic Atrophy | |
| Leber's Optic Neuropathy (LHON) | |
| Leg Cramps, Nocturnal | |
| Leg Injuries | |
| Leg Problems, Noninjury | |
| Legg Calve Perthes Disease | |
| Legionellosis | |
| Legionnaires' Disease | |
| Leigh Necrotizing Encephalopathy | |
| Leigh's Disease | |
| Leigh's Syndrome | |
| Leiner Disease | Top |
| Leiner-Moussous Desquamative Erythroderma | |
| Leiomyosarcoma of the Uterus | |
| Leiomyosarcoma, General | |
| LEMS | |
| Lennox Gastaut Syndrome | |
| Lenticular Degeneration, Progressive | |
| 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 | |
| Leroy Disease | |
| Lesch Nyhan Syndrome | |
| Lethal Neonatal Dwarfism | |
| Lethal Osteochondrodysplasia | Top |
| Letterer-Siwe Disease | |
| 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, 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, hairy cell: Treatment - Health Professional Information [NCI PDQ] | |
| Leukemia, hairy cell: Treatment - Patient Information [NCI PDQ] | |
| Leukemia, Radiation Therapy for | |
| Leukocytic Anomaly Albinism | |
| Leukocytic Inclusions with Platelet Abnormality | |
| Leukocytoclastic Vasculitis | |
| Leukoderma | |
| Leukodystrophy | |
| Leukodystrophy with Rosenthal Fibers | |
| Leukodystrophy, Globoid Cell | |
| Leukodystrophy, Krabbe's | |
| Leukodystrophy, Metachromatic | Top |
| Leukoencephalitis Periaxialis Concentric | |
| 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 - Health Professional Information [NCI PDQ] | |
| Levine-Critchley Syndrome | |
| Levulosuria | |
| Levy-Hollister Syndrome | |
| Levy-Yeboa Syndrome | |
| Leyden-Moebius Muscular Dystrophy | |
LG | |
| LGMD | |
| LGS | |
LI | |
| Lice | |
| 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 | |
| Life Span and Smoking Calculator | |
| Life-Prolonging Treatments at End of Life, Deciding About | |
| Light Therapy | Top |
| Light Therapy (Using), For Seasonal Affective Disorder | |
| Lightheadedness | |
| Lignac-Fanconi Syndrome | |
| Limb Body Wall Complex | |
| Limb Malformations-Dento-Digital Syndrome | |
| Limit Dextrinosis | |
| Lindau Disease | |
| Linear Nevus Sebacous Syndrome | |
| Linear Sebaceous Nevus Sequence | |
| Linear Sebaceous Nevus Syndrome | |
| Lingua Fissurata | |
| Lingua Nigra | |
| Lingua Plicata | |
| Lingua Scrotalis | |
| Lingua Villosa Nigra | |
| Linguofacial Dyskinesia | |
| Lip Pseudocleft-hemangiomatous Branchial Cyst Syndrome | |
| lipase D deficiency | |
| LIPD deficiency | |
| lipid histiocytosis | |
| Lipid histiocytosis (kerasin type) | |
| Lipid Panel | |
| Lipid-Storage Myopathy Associated with SCAD Deficiency | |
| lipidosis, sphingomyelin | |
| Lipodystrophy | Top |
| Lipodystrophy, partial, with Rieger anomaly and short stature | |
| Lipoid Granulomatosis | |
| Lipoma | |
| Lipomatosis Dolorosa Morbus Dercum’s | |
| Lipomatosis of Pancreas, Congenital | |
| Lipomucopolysaccharidosis Type I | |
| lipoprotein lipase deficiency | |
| lipoprotein lipase, included; LPL, included | |
| Liposuction | |
| Lissencephaly | |
| lissencephaly, type I | |
| Listeria Infection | |
| Listeriosis | |
| Listeriosis | |
| Lithotripsy (ESWL) for Kidney Stones, Deciding About | |
| Livedo Reticularis and Cerebrovascular Accidents | |
| 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 fluke disease | |
| Liver Function Panel | |
| Liver Phosphorylase Deficiency | |
| Liver resection | |
| Living Will | Top |
| Living With a Spinal Cord Injury | |
| Lizard and Snake Bites | |
LK | |
| LKS | |
LM | |
| LM Syndrome | |
| LMs | |
LO | |
| LO-CHS 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 | |
| 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 | |
| Loken-Senior Syndrome | |
| Long Chain Acyl-CoA Dehydrogenase Deficiency | |
| Long QT Syndrome Type 1 | Top |
| Long QT Syndrome without Deafness | |
| 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] | |
| Lota | |
| Louis-Bar Syndrome | |
| Low Back Pain | |
| Low Back Pain, Deciding About MRI | |
| Low Back Pain, Deciding About Spinal Manipulation | |
| Low Back Pain, IDET (Intradiscal Electrothermic Therapy) for | |
| Low back pain: Exercises to reduce pain | |
| Low back pain: Should I have an MRI? | |
| Low back pain: Should I have spinal manipulation? | |
| 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 Density B-lipoprotein Deficiency | |
| Low Imperforate Anus | |
| Low Potassium Syndrome | |
| Low-Carb Diets for Weight Loss | Top |
| Low-Density Beta Lipoprotein Deficiency | |
| Low-Dose Aspirin Therapy | |
| Low-Grade Papillary Carcinoma of the Palate | |
| Low-salt diet for cirrhosis, Eating a | |
| Low-Salt Diet for Heart Failure | |
| Low-salt diets: Eating out | |
| Low-Sodium Diet for Heart Failure | |
| Lowe Syndrome | |
| Lower Leg Injuries | |
| Lower Leg Problems, Noninjury | |
LP | |
| LPL deficiency | |
LQ | |
| LQTS1 | |
LT | |
| LTD1 | |
LU | |
| Lubs Syndrome | |
| Lues, Congenital | |
| Lumbar Pain | |
| Lumbar Spinal Stenosis | |
| Lumpectomy for Breast Cancer | |
| Lumpectomy or a Mastectomy to Treat Early-Stage Breast Cancer, Deciding About | |
| Lumps Under the Skin | |
| Lunatomalacia | |
| Lung Cancer | |
| Lung cancer, non-small cell: Treatment - Health Professional Information [NCI PDQ] | |
| Lung cancer, non-small cell: Treatment - Patient Information [NCI PDQ] | |
| Lung cancer, small cell: Treatment - Health Professional Information [NCI PDQ] | Top |
| 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 Nocardiosis | |
| Lung surgery (thoracotomy) for lung cancer | |
| Lung transplant for cystic fibrosis | |
| Lupus (Systemic Lupus Erythematosus) | |
| Lupus Anticoagulant Syndrome | |
| Luschka-Magendie Foramina Atresia | |
| Lutz-Splendore-Almeida Disease | |
LY | |
| Lyell Syndrome | |
| Lyelles Syndrome | |
| Lyme Disease | |
| Lymph Node Cancer (Non-Hodgkin's Lymphoma) | |
| Lymph node removal (lymphadenectomy) for melanoma | |
| Lymphadenectomy for endometrial cancer | |
| Lymphadenitis, Regional Nonbacterial | |
| Lymphadenoid goiter | |
| Lymphadenopathy (Swollen Lymph Nodes) | |
| Lymphadenopathy, Angioimmunoblastic with Dysproteinemia | |
| Lymphangiectasia, Primary Intestinal | |
| Lymphangiectasis, Primary Intestinal | |
| Lymphangiectatic Protein-Losing Enteropathy | Top |
| Lymphangioleimyomatosis | |
| Lymphangioleiomatosis | |
| Lymphangioleiomyomatosis | |
| Lymphangiomas | |
| Lymphatic Malformations | |
| Lymphedema | |
| Lymphedema with Distichiasis | |
| Lymphedema with Yellow Nails | |
| Lymphedema, Hereditary | |
| Lymphedema, Neonatal due to Exudative Enteropathy | |
| Lymphedema-Distichiasis Syndrome | |
| Lymphedema: Managing lymphedema | |
| Lymphedema: Supportive care - Health Professional Information [NCI PDQ] | |
| Lymphedema: Supportive care - Patient Information [NCI PDQ] | |
| Lymphocytic Infiltrate of Jessner | |
| 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 | |
| Lymphoreticulosis, Benign Inoculation | |
| Lynch Syndromes | |
| Lysosomal Acid Lipase Deficiency, Wolman Type | |
| Lysosomal Alpha-D-Mannosidase Deficiency | |
| Lysosomal Alpha-N-Acetylgalactosaminidase Deficiency, Schindler Type | Top |
| Lysosomal Glucosidase Deficiency | |
| Lysosomal Glycogen Storage Disease Without Acid Maltase Deficiency | |
| Lysosomal Storage Disorders | |
