L-2-hydroxyglutaric Aciduria (Rare Diseases / Metabolic Disorders) L-2-hydroxyglutaric Aciduria (Rare Diseases / Nervous System Diseases) L-arginine:glycine Amidinotransferase Deficiency (Rare Diseases / Metabolic Disorders) L-arginine:glycine Amidinotransferase Deficiency (Rare Diseases / Nervous System Diseases) L-arginine:glycine Amidinotransferase Deficiency (Rare Diseases / Newborn Screening) Laband Syndrome (Rare Diseases / Mouth Diseases) Laband Syndrome (Rare Diseases / Nervous System Diseases) Labiaplasty (Procedures / Reconstructive & Aesthetic) Labor & Delivery (Emergency Medicine / Obstetric & Gynecologic) Labor & Delivery (Obstetrics & Gynecology / Labor & Delivery) Labor & Delivery Anesthesia (Procedures / Anesthetic Techniques) Labor Pain (Obstetrics & Gynecology / Labor & Delivery) Labyrinthectomy (Procedures / Ear, Nose, Throat, & Dental ) Labyrinthitis (Emergency Medicine / Neurologic) Labyrinthitis (Neurology / Neuro-otology) Lachiewicz Sibley Syndrome (Rare Diseases / Miscellaneous) Lacrimal Gland Tumors (Ophthalmology / Lacrimal System) Lacrimal Gland Tumors (Emergency Medicine / Ophthalmologic) Lacrimal System (Ophthalmology / Lacrimal System) Lacrimo-auriculo-dento-digital Syndrome (Rare Diseases / Eye Diseases) Lacrimo-auriculo-dento-digital Syndrome (Rare Diseases / Musculoskeletal Diseases) Lacrimo-auriculo-dento-digital Syndrome (Rare Diseases / Skin Diseases) Lacrimo-auriculo-dento-digital Syndrome (Rare Diseases / Ear, Nose, & Throat Diseases) Lacrimo-auriculo-dento-digital Syndrome (Rare Diseases / Mouth Diseases) La Crosse Encephalitis (Rare Diseases / Nervous System Diseases) La Crosse Encephalitis (Rare Diseases / Viral Infections) Lactate Dehydrogenase A Deficiency (Rare Diseases / Metabolic Disorders) Lactate Dehydrogenase Deficiency (Rare Diseases / Metabolic Disorders) Lactation Guidance (Family Medicine / Adolescence to Adulthood) Lactation Guidance (Pharmacy / Adolescence to Adulthood) Lactation Guidance (NP/PA Practice / Adolescence to Adulthood) Lactose Intolerance (Gastroenterology / Intestinal Conditions) Lacunar Stroke (Physiatry / Stroke) Lacunar Syndrome (Neurology / Neurovascular Diseases) Lafora Disease (Rare Diseases / Nervous System Diseases) Laing Distal Myopathy (Rare Diseases / Nervous System Diseases) Lambdoid Synostosis (Rare Diseases / Musculoskeletal Diseases) Lambert-eaton Myasthenic Syndrome (Rare Diseases / Nervous System Diseases) Lambert-eaton Myasthenic Syndrome (Neurology / Neuromuscular Diseases) Lambert Eaton Myasthenic Syndrome (Rare Diseases / Musculoskeletal Diseases) Lambert Syndrome (Rare Diseases / Mouth Diseases) Lambert Syndrome (Rare Diseases / Ear, Nose, & Throat Diseases) Lamellar Ichthyosis (Rare Diseases / Eye Diseases) Lamellar Ichthyosis (Rare Diseases / Skin Diseases) Laminoplasty (Procedures / Brain & Spinal Cord) Landau-Kleffner Syndrome (Rare Diseases / Nervous System Diseases) Landau-Kleffner Syndrome (Rare Diseases / Eye Diseases) Langerhans Cell Histiocytosis (Rare Diseases / Endocrine Diseases) Langerhans Cell Histiocytosis (Rare Diseases / Hereditary Cancer Syndromes) Langerhans Cell Histiocytosis (Oncology / Skin Cancers) Langerhans Cell Sarcoma (Rare Diseases / Blood Diseases) Langerhans Cell Sarcoma (Rare Diseases / Rare Cancers) Langer Mesomelic Dysplasia (Rare Diseases / Musculoskeletal Diseases) Laparoscopic Gastric Bypass (Gastroenterology / Stomach Conditions) Laparoscopic Inguinal Hernia Repair (Gastroenterology / Stomach Conditions) Laparoscopic Lap Band Placement (Gastroenterology / Stomach Conditions) Laparoscopic Pelvic Lymph Node Dissection (Urology / Surgery) Laparoscopy (Procedures / Gastronintestinal) Laparotomy (Procedures / Gastronintestinal) Lap Band Placement (Procedures / Gastronintestinal) Large-bowel Obstruction (Emergency Medicine / Gastrointestinal) Large-cell Lymphoma (Rare Diseases / Rare Cancers) Large Granular Lymphocyte Leukemia (Rare Diseases / Rare Cancers) Large Granular Lymphocyte Leukemia (Rare Diseases / Blood Diseases) Large Granular Lymphocyte Leukemia (Rare Diseases / Immune System Diseases) Laron Syndrome (Rare Diseases / Endocrine Diseases) Larsen-like Syndrome (Rare Diseases / Miscellaneous) Larsen Syndrome (Rare Diseases / Musculoskeletal Diseases) Larsen Syndrome (Rare Diseases / Mouth Diseases) Larsen Syndrome (Rare Diseases / Ear, Nose, & Throat Diseases) Laryngeal Cancer (Oncology / Head & Neck Cancers) Laryngeal Cancer (Rare Diseases / Rare Cancers) Laryngeal Fractures (Trauma / Head & Neck) Laryngeal Mask Airway (Critical Care / Airway & Ventilator Management) Laryngeal Tremor (Neurology / Movement & Neurodegenerative Diseases) Laryngitis (Emergency Medicine / Ear, Nose, & Throat ) Laryngomalacia (Rare Diseases / Ear, Nose, & Throat Diseases) Laryngoonychocutaneous Syndrome (Rare Diseases / Skin Diseases) Laryngoonychocutaneous Syndrome (Rare Diseases / Eye Diseases) Laryngoonychocutaneous Syndrome (Rare Diseases / Lung Diseases) Laryngoonychocutaneous Syndrome (Rare Diseases / Mouth Diseases) Laryngotracheobronchitis (Emergency Medicine / Pediatric) Larynx Atresia (Rare Diseases / Ear, Nose, & Throat Diseases) Larynx Tumors (Oncology / Head & Neck Cancers) Lasek (Ophthalmology / Refractive Disorders) Laser-assisted Hair Removal (Procedures / Reconstructive & Aesthetic) Laser Discectomy (Neurology / Headache & Pain) Lasers in Dermatology (Dermatology / Laser & Other Physicial Modalities) Lasers in Urology (Urology / Surgery) Laser Skin Resurfacing (Procedures / Reconstructive & Aesthetic) Lasik Astigmatism (Ophthalmology / Refractive Disorders) Lasik Astigmatism (Procedures / Eye Procedures) Lasik Hyperopia (Emergency Medicine / Ophthalmologic) Lasik Hyperopia (Ophthalmology / Refractive Disorders) Lasik Myopia (Ophthalmology / Refractive Disorders) Lasik Myopia (Procedures / Eye Procedures) Late-onset Junctional Epidermolysis Bullosa (Rare Diseases / Skin Diseases) Late-onset Junctional Epidermolysis Bullosa (Rare Diseases / Mouth Diseases) Late-onset Localized Junctional Epidermolysis Bullosa-intellectual Disability Syndrome (Rare Diseases / Skin Diseases) Late-onset Localized Junctional Epidermolysis Bullosa-intellectual Disability Syndrome (Rare Diseases / Mouth Diseases) Late-onset Retinal Degeneration (Rare Diseases / Eye Diseases) Lateral Compartment Arthritis (Rheumatology / Inflammatory Arthritis) Lateral Epicondylitis (Sports Medicine / Upper Limb) Lateral Epicondylitis Surgery (Orthopedic Surgery / Elbow) Lateral Humeral Condyle Fracture (Orthopedic Surgery / Elbow) Lateral Meningocele Syndrome (Rare Diseases / Nervous System Diseases) Lateral Meningocele Syndrome (Rare Diseases / Musculoskeletal Diseases) Lateral Orbital Canthotomy (Ophthalmology / Orbit) Latex Allergy (Allergy & Immunology / Latex Allergy) Latex Allergy (Emergency Medicine / Allergic & Immunologic) Lathosterolosis (Rare Diseases / Metabolic Disorders) Lattice Corneal Dystrophy (Ophthalmology / Cornea) Lattice Corneal Dystrophy (Rare Diseases / Eye Diseases) Lattice Degeneration (Ophthalmology / Retina) Lattice Degeneration (Emergency Medicine / Ophthalmologic) Laurence-Moon Syndrome (Rare Diseases / Eye Diseases) Laurence-Moon Syndrome (Rare Diseases / Endocrine Diseases) Laurence-Moon Syndrome (Rare Diseases / Male Reproductive Diseases) Laurence-Moon Syndrome (Rare Diseases / Female Reproductive Diseases) Laurence-Moon Syndrome (Rare Diseases / Nervous System Diseases) Laurin-Sandrow Syndrome (Rare Diseases / Musculoskeletal Diseases) LCHAD Deficiency (Rare Diseases / Endocrine Diseases) LCHAD Deficiency (Rare Diseases / Heart Diseases) LCHAD Deficiency (Rare Diseases / Nervous System Diseases) LCHAD Deficiency (Rare Diseases / Metabolic Disorders) LCHAD Deficiency (Rare Diseases / Newborn Screening) LCHAD Deficiency (Rare Diseases / Eye Diseases) LDL Cholesterol (Laboratory Medicine / Cardiology) Lead Nephropathy (Emergency Medicine / Genitourinary) Lead Nephropathy (Nephrology / Drug & Nephrotoxin Related) Lead Toxicity (Pediatrics / Toxicology) Lead Toxicity (Critical Care / Toxicology) Lead Toxicity (Neurology / Neurotoxicology) Lead Toxicity (Emergency Medicine / Toxicologic) Learning Disorders (Pediatrics / Developmental & Behavioral) Leber Congenital Amaurosis (Rare Diseases / Eye Diseases) Leber Congenital Amaurosis (Rare Diseases / Miscellaneous) Leber Hereditary Optic Neuropathy (Rare Diseases / Heart Diseases) Leber Hereditary Optic Neuropathy (Rare Diseases / Eye Diseases) Leber Hereditary Optic Neuropathy (Rare Diseases / Metabolic Disorders) Leber Hereditary Optic Neuropathy with Dystonia (Rare Diseases / Nervous System Diseases) Ledderhose Disease (Rare Diseases / Rare Cancers) Ledderhose Disease (Rare Diseases / Skin Diseases) Left-sided Gallbladder (Rare Diseases / Miscellaneous) Left Ventricular Noncompaction (Rare Diseases / Heart Diseases) Legg-Calve-Perthes Disease (Rare Diseases / Connective Tissue Diseases) Legg-Calve-Perthes Disease (Orthopedic Surgery / Hip) Legg-Calve-Perthes Disease (Rare Diseases / Musculoskeletal Diseases) Legionellosis (Rare Diseases / Bacterial Infections) Legionnaires Disease (Pulmonology / Idiopathic Lung Disorders) Legionnaires Disease (Infectious Disease / Lower Respiratory Tract Infections) Legius Syndrome (Rare Diseases / Skin Diseases) Leiomyoma (Rare Diseases / Digestive Diseases) Leiomyoma (Dermatology / Benign Neoplasms) Leiomyosarcoma (Rare Diseases / Rare Cancers) Leiomyosarcoma of the Inferior Vena Cava (Rare Diseases / Rare Cancers) Leishmaniasis (Infectious Disease / Parasitic Infections) Leishmaniasis (Rare Diseases / Parasitic Diseases) Leisti Hollister Rimoin Syndrome (Rare Diseases / Nervous System Diseases) Lelis Syndrome (Rare Diseases / Skin Diseases) Le Marec Bracq Picaud Syndrome (Rare Diseases / Miscellaneous) Lemierre Syndrome (Rare Diseases / Bacterial Infections) Lennox-gastaut Syndrome (Rare Diseases / Nervous System Diseases) Lennox-gastaut Syndrome (Neurology / Pediatric Neurology) Lens-particle Glaucoma (Ophthalmology / Intraocular Pressure) Lens-particle Glaucoma (Emergency Medicine / Ophthalmologic) Lentigo (Dermatology / Pigmentation) Lentigo Maligna Melanoma (Dermatology / Malignant Neoplasms) Lentigo Maligna Melanoma (Oncology / Skin Cancers) Lentigo Maligna Melanoma (Rare Diseases / Rare Cancers) Lenz Majewski Hyperostotic Dwarfism (Rare Diseases / Nervous System Diseases) Lenz Majewski Hyperostotic Dwarfism (Rare Diseases / Musculoskeletal Diseases) Lenz Microphthalmia Syndrome (Rare Diseases / Eye Diseases) Lenz Microphthalmia Syndrome (Rare Diseases / Nervous System Diseases) Leopard Syndrome (Rare Diseases / Heart Diseases) Leopard Syndrome (Rare Diseases / Eye Diseases) Leopard Syndrome (Rare Diseases / Skin Diseases) Leopard Syndrome (Rare Diseases / Ear, Nose, & Throat Diseases) Leopard Syndrome (Rare Diseases / Rare Cancers) Leprechaunism (Rare Diseases / Endocrine Diseases) Leprechaunism (Rare Diseases / Skin Diseases) Leprosy (Infectious Disease / Skin & Soft Tissue Infections) Leprosy Neuropathy (Neurology / Neurologic Infections) Leptomeningeal Carcinomatosis (Oncology / Neuro-oncology) Leptospirosis (Rare Diseases / Viral Infections) Leptospirosis (Infectious Disease / Bacterial Infections) Leri Pleonosteosis (Rare Diseases / Musculoskeletal Diseases) Leri Weill Dyschondrosteosis (Rare Diseases / Musculoskeletal Diseases) Lesch-nyhan Disease (Rare Diseases / Nervous System Diseases) Lesch-nyhan Disease (Neurology / Pediatric Neurology) Lesch Nyhan Syndrome (Rare Diseases / Nervous System Diseases) Lesch Nyhan Syndrome (Rare Diseases / Kidney & Urinary Diseases) Lesch Nyhan Syndrome (Rare Diseases / Metabolic Disorders) Lesch Nyhan Syndrome (Rare Diseases / Blood Diseases) Lethal Acantholytic Epidermolysis Bullosa (Rare Diseases / Skin Diseases) Lethal Chondrodysplasia Moerman Type (Rare Diseases / Musculoskeletal Diseases) Lethal Chondrodysplasia Seller Type (Rare Diseases / Musculoskeletal Diseases) Lethal Congenital Contracture Syndrome 1 (Rare Diseases / Lung Diseases) Leucine-sensitive Hypoglycemia of Infancy (Rare Diseases / Metabolic Disorders) Leukemia (Hematology / Leukemia) Leukemia Cutis (Oncology / Skin Cancers) Leukemias (Pharmacy / Hematologic Disorders) Leukemias (NP/PA Practice / Hematologic Disorders) Leukemias (Ophthalmology / Globe) Leukemias (Internal Medicine / Hematologic Disorders) Leukemias (Family Medicine / Hematologic Disorders) Leukemias (Oncology / Ophthalmologic Cancers) Leukemia Subleukemic (Rare Diseases / Rare Cancers) Leukocyte Adhesion Deficiency (Rare Diseases / Autoimmune / Autoinflammatory Diseases) Leukocyte Adhesion Deficiency (Rare Diseases / Immune System Diseases) Leukocyte Count (Laboratory Medicine / Hematology) Leukocytoclastic Vasculitis (Rheumatology / Vasculitis) Leukodystrophy (Rare Diseases / Eye Diseases) Leukodystrophy (Rare Diseases / Nervous System Diseases) Leukodystrophy, Dysmyelinating, & Spastic Paraparesis with Or Without Dystonia (Rare Diseases / Nervous System Diseases) Leukodystrophy with Oligodontia (Rare Diseases / Nervous System Diseases) Leukoencephalopathy (Rare Diseases / Miscellaneous) Leukoencephalopathy - Dystonia - Motor Neuropathy (Rare Diseases / Metabolic Disorders) Leukoencephalopathy - Dystonia - Motor Neuropathy (Rare Diseases / Nervous System Diseases) Leukoencephalopathy Palmoplantar Keratoderma (Rare Diseases / Skin Diseases) Leukoencephalopathy with Brain Stem & Spinal Cord Involvement & Lactate Elevation (Rare Diseases / Metabolic Disorders) Leukoencephalopathy with Brain Stem & Spinal Cord Involvement & Lactate Elevation (Rare Diseases / Nervous System Diseases) Leukoencephalopathy with Thalamus & Brainstem Involvement & High Lactate (Rare Diseases / Nervous System Diseases) Leukonychia Totalis (Rare Diseases / Skin Diseases) Levator Syndrome (Rare Diseases / Musculoskeletal Diseases) Levic Stefanovic Nikolic Syndrome (Rare Diseases / Nervous System Diseases) Levy-yeboa Syndrome (Rare Diseases / Miscellaneous) Lewis-sumner Syndrome (Rare Diseases / Nervous System Diseases) LGBTQ (Pharmacy / Adolescence to Adulthood) LGBTQ (NP/PA Practice / Adolescence to Adulthood) LGBTQ (Internal Medicine / Adulthood Issues) LGBTQ (Family Medicine / Adolescence to Adulthood) Lhermitte-duclos Disease (Rare Diseases / Rare Cancers) Lhermitte-duclos Disease (Rare Diseases / Nervous System Diseases) Li-fraumeni Syndrome (Rare Diseases / Endocrine Diseases) Li-fraumeni Syndrome (Rare Diseases / Nervous System Diseases) Li-fraumeni Syndrome (Rare Diseases / Rare Cancers) Li-fraumeni Syndrome (Rare Diseases / Hereditary Cancer Syndromes) Lice (Dermatology / Parasitic Infections) Lichen Planopilaris (Rare Diseases / Skin Diseases) Lichen Planus (Rare Diseases / Skin Diseases) Lichen Planus Pemphigoides (Rare Diseases / Skin Diseases) Lichen Planus Pigmentosus (Rare Diseases / Skin Diseases) Lichen Sclerosus (Rare Diseases / Skin Diseases) Lichen Simplex Chronicus (Allergy & Immunology / Allergy Pathogenesis) Lichtenstein Syndrome (Rare Diseases / Miscellaneous) Liddle Syndrome (Rare Diseases / Blood Diseases) Liddle Syndrome (Rare Diseases / Kidney & Urinary Diseases) Lifestyle Management (Internal Medicine / Adulthood Issues) Lifestyle Management (Pharmacy / Health Maintenance) Lifestyle Management (NP/PA Practice / Health Maintenance) Lifestyle Management (Family Medicine / Health Maintenance) Ligament Injury (Physiatry / Lower Limb) Light-chain Deposition Disease (Nephrology / Systemic Diseases & the Kidney) Light Chain-associated Renal Disorders (Nephrology / Systemic Diseases & the Kidney) Lightning Injuries (Emergency Medicine / Environmental) Ligneous Conjunctivitis (Rare Diseases / Eye Diseases) Limb-Body Wall Complex (Rare Diseases / Digestive Diseases) Limb-girdle Muscular Dystrophy (Rare Diseases / Heart Diseases) Limb-girdle Muscular Dystrophy (Neurology / Neuromuscular Diseases) Limb-girdle Muscular Dystrophy (Orthopedic Surgery / Systemic Diseases) Limb-girdle Muscular Dystrophy (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy (Rare Diseases / Musculoskeletal Diseases) Limb-girdle Muscular Dystrophy, Type 2c (Rare Diseases / Heart Diseases) Limb-girdle Muscular Dystrophy, Type 2d (Rare Diseases / Heart Diseases) Limb-girdle Muscular Dystrophy, Type 2d (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy, Type 2g (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 1a (Rare Diseases / Musculoskeletal Diseases) Limb-girdle Muscular Dystrophy Type 1b (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 1c (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 1d (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 1e (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 1f (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 1g (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 1h (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2a (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2a (Rare Diseases / Musculoskeletal Diseases) Limb-girdle Muscular Dystrophy Type 2b (Rare Diseases / Musculoskeletal Diseases) Limb-girdle Muscular Dystrophy Type 2b (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2c (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2c (Rare Diseases / Musculoskeletal Diseases) Limb-girdle Muscular Dystrophy Type 2c (Rare Diseases / Metabolic Disorders) Limb-girdle Muscular Dystrophy Type 2d (Rare Diseases / Musculoskeletal Diseases) Limb-girdle Muscular Dystrophy Type 2e (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2e (Rare Diseases / Heart Diseases) Limb-girdle Muscular Dystrophy Type 2e (Rare Diseases / Musculoskeletal Diseases) Limb-girdle Muscular Dystrophy Type 2f (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2f (Rare Diseases / Musculoskeletal Diseases) Limb-girdle Muscular Dystrophy Type 2f (Rare Diseases / Heart Diseases) Limb-girdle Muscular Dystrophy Type 2h (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2h (Rare Diseases / Musculoskeletal Diseases) Limb-girdle Muscular Dystrophy Type 2i (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2i (Rare Diseases / Metabolic Disorders) Limb-girdle Muscular Dystrophy Type 2j (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2k (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2k (Rare Diseases / Metabolic Disorders) Limb-girdle Muscular Dystrophy Type 2l (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2m (Rare Diseases / Heart Diseases) Limb-girdle Muscular Dystrophy Type 2m (Rare Diseases / Metabolic Disorders) Limb-girdle Muscular Dystrophy Type 2m (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2n (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2n (Rare Diseases / Metabolic Disorders) Limb-girdle Muscular Dystrophy Type 2o (Rare Diseases / Metabolic Disorders) Limb-girdle Muscular Dystrophy Type 2o (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2p (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2q (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2s (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2t (Rare Diseases / Nervous System Diseases) Limb-girdle Muscular Dystrophy Type 2t (Rare Diseases / Metabolic Disorders) Limb-mammary Syndrome (Rare Diseases / Female Reproductive Diseases) Limb-mammary Syndrome (Rare Diseases / Skin Diseases) Limb-mammary Syndrome (Rare Diseases / Eye Diseases) Limb-mammary Syndrome (Rare Diseases / Musculoskeletal Diseases) Limbal Dermoid (Ophthalmology / Cornea) Limbic Encephalitis with Lgi1 Antibodies (Rare Diseases / Nervous System Diseases) Limited Cutaneous Systemic Sclerosis (Rare Diseases / Nervous System Diseases) Limited Cutaneous Systemic Sclerosis (Rare Diseases / Lung Diseases) Limited Cutaneous Systemic Sclerosis (Rare Diseases / Skin Diseases) Limited Cutaneous Systemic Sclerosis (Rare Diseases / Kidney & Urinary Diseases) Limited Cutaneous Systemic Sclerosis (Rare Diseases / Heart Diseases) Limited Systemic Sclerosis (Rare Diseases / Lung Diseases) Limited Systemic Sclerosis (Rare Diseases / Skin Diseases) Limited Systemic Sclerosis (Rare Diseases / Heart Diseases) Limited Systemic Sclerosis (Rare Diseases / Kidney & Urinary Diseases) Limping Child (Orthopedic Surgery / Pediatrics) Lin-Gettig Syndrome (Rare Diseases / Miscellaneous) Linear & Whorled Nevoid Hypermelanosis (Rare Diseases / Skin Diseases) Linear IgA Disease (Rare Diseases / Skin Diseases) Linear Lichen Planus (Rare Diseases / Skin Diseases) Linear Nevus Sebaceous Syndrome (Rare Diseases / Eye Diseases) Linear Nevus Sebaceous Syndrome (Rare Diseases / Rare Cancers) Linear Nevus Sebaceous Syndrome (Rare Diseases / Skin Diseases) Linear Scleroderma (Rare Diseases / Skin Diseases) Lip & Oral Cavity Cancer (Rare Diseases / Rare Cancers) Lipase Deficiency Combined (Rare Diseases / Metabolic Disorders) Lipase Level (Laboratory Medicine / Hepatology) Lip Augmentation (Procedures / Reconstructive & Aesthetic) Lip Biopsy (Oncology / Head & Neck Cancers) Lip Biopsy (Procedures / Ear, Nose, Throat, & Dental ) Lipe-related Familial Partial Lipodystrophy (Rare Diseases / Endocrine Diseases) Lipe-related Familial Partial Lipodystrophy (Rare Diseases / Skin Diseases) Lipedema (Rare Diseases / Skin Diseases) Lipedema (Rare Diseases / Blood Diseases) Lipid Disorders (Internal Medicine / Cardiovascular Disorders) Lipid Disorders (Pharmacy / Endocrine Disorders) Lipid Disorders (Pharmacy / Cardiovascular Disorders) Lipid Disorders (Family Medicine / Endocrine Disorders) Lipid Disorders (NP/PA Practice / Endocrine Disorders) Lipid Disorders (Internal Medicine / Endocrine Disorders) Lipid Disorders (NP/PA Practice / Cardiovascular Disorders) Lipid Disorders (Family Medicine / Cardiovascular Disorders) Lipid Management (Cardiology / Lipid Management) Lipid Management Guidelines (Cardiology / Atherosclerosis) Lipid Profile (Laboratory Medicine / Cardiology) Lipids & Diabetes (Endocrinology & Diabetes / Lipids & Cardiovascular Risk Management) Lipoblastoma (Rare Diseases / Rare Cancers) Lipodystrophy (Rare Diseases / Skin Diseases) Lipodystrophy (Rare Diseases / Endocrine Diseases) Lipodystrophy Due to Peptidic Growth Factors Deficiency (Rare Diseases / Skin Diseases) Lipofibromatous Hamartoma (Orthopedic Surgery / Neoplasms) Lipoic Acid Synthetase Deficiency (Rare Diseases / Nervous System Diseases) Lipoic Acid Synthetase Deficiency (Rare Diseases / Metabolic Disorders) Lipoid Proteinosis of Urbach & Wiethe (Rare Diseases / Metabolic Disorders) Lipoid Proteinosis of Urbach & Wiethe (Rare Diseases / Skin Diseases) Lipomas (General Surgery / Abdomen) Lipoprotein (a) (Laboratory Medicine / Cardiology) Liposarcoma (Oncology / Bone & Soft Tissue) Liposarcoma (Rare Diseases / Rare Cancers) Liposarcoma (Dermatology / Malignant Neoplasms) Liposuction (Procedures / Reconstructive & Aesthetic) Lip Reconstruction (Procedures / Reconstructive & Aesthetic) Lip Reduction (Procedures / Reconstructive & Aesthetic) Lisfranc Fracture Dislocation (Orthopedic Surgery / Foot & Ankle) Lissencephaly (Rare Diseases / Blood Diseases) Lissencephaly 1 (Rare Diseases / Nervous System Diseases) Lissencephaly 2 (Rare Diseases / Nervous System Diseases) Lissencephaly 2 (Rare Diseases / Skin Diseases) Lissencephaly X-linked (Rare Diseases / Nervous System Diseases) Listeria Infection (Rare Diseases / Bacterial Infections) Listeria Monocytogenes (Infectious Disease / Bacterial Infections) Listeriosis (Rare Diseases / Bacterial Infections) Lithium-induced Goiter (Endocrinology & Diabetes / Thyroid Disease) Lithium Level (Laboratory Medicine / Endocrinology) Lithium Nephropathy (Nephrology / Drug & Nephrotoxin Related) Lithium Nephropathy (Emergency Medicine / Genitourinary) Lithium Toxicity (Emergency Medicine / Toxicologic) Liver Abscess (Gastroenterology / Liver Diseases) Liver Abscess (General Surgery / Abdomen) Liver Biopsy (Procedures / Gastronintestinal) Liver Diseases (Gastroenterology / Liver Diseases) Liver Transplantation (Procedures / Transplantation) Liver Transplantation (Gastroenterology / Liver Diseases) Liver Transplants (Emergency Medicine / Gastrointestinal) Liver Tumors (Oncology / Gastrointestinal Cancers) Living Donor Hepatectomy (Procedures / Transplantation) Lizard Envenomation (Emergency Medicine / Environmental) Lobomycosis (Infectious Disease / Skin & Soft Tissue Infections) Local & Regional Anesthesia (Pain Management / Procedures) Local Anesthesia (Pain Management / Local Anesthesia) Local Anesthesia (Procedures / Anesthetic Techniques) Local Anesthesia with Sedation (Pain Management / Procedures) Local Anesthetic Toxicity (Emergency Medicine / Toxicologic) Localized Epidermolysis Bullosa Simplex (Rare Diseases / Skin Diseases) Localized Fibrosing Disorders (Rheumatology / Soft Tissue & Regional Disease) Localized Hypertrophic Neuropathy (Rare Diseases / Nervous System Diseases) Localized Scleroderma (Rare Diseases / Skin Diseases) Locked-in Syndrome (Rare Diseases / Nervous System Diseases) Loeys-Dietz Syndrome (Rare Diseases / Blood Diseases) Loeys-Dietz Syndrome (Rare Diseases / Lung Diseases) Loeys-Dietz Syndrome (Rare Diseases / Musculoskeletal Diseases) Loeys-Dietz Syndrome Type 1 (Rare Diseases / Lung Diseases) Loeys-Dietz Syndrome Type 2 (Rare Diseases / Heart Diseases) Loeys-Dietz Syndrome Type 2 (Rare Diseases / Lung Diseases) Loeys-Dietz Syndrome Type 3 (Rare Diseases / Lung Diseases) Loeys-Dietz Syndrome Type 4 (Rare Diseases / Lung Diseases) Loeys-Dietz Syndrome Type 4 (Rare Diseases / Heart Diseases) Logopenic Progressive Aphasia (Rare Diseases / Nervous System Diseases) Long-acting Reversible Contraception (Obstetrics & Gynecology / Contraception) Long QT Syndrome (Cardiology / Arrhythmias) Long QT Syndrome 1 (Rare Diseases / Heart Diseases) Loop Colostomy (Procedures / Gastronintestinal) Loop Electrosurgical Excision (Procedures / Obstetric & Gynecologic) Loose Anagen Hair Syndrome (Rare Diseases / Skin Diseases) Lopes Gorlin Syndrome (Rare Diseases / Miscellaneous) Low-grade Astrocytoma (Oncology / Neuro-oncology) Low-grade Central Osteosarcoma (Orthopedic Surgery / Neoplasms) Low-tension Glaucoma (Ophthalmology / Intraocular Pressure) Low-tension Glaucoma (Emergency Medicine / Ophthalmologic) Low Back Pain (Internal Medicine / Musculoskeletal Conditions) Low Back Pain (Pharmacy / Musculoskeletal Conditions) Low Back Pain (NP/PA Practice / Musculoskeletal Conditions) Low Back Pain (Family Medicine / Musculoskeletal Conditions) Lowe Oculocerebrorenal Syndrome (Rare Diseases / Eye Diseases) Lowe Oculocerebrorenal Syndrome (Rare Diseases / Kidney & Urinary Diseases) Lowe Oculocerebrorenal Syndrome (Rare Diseases / Nervous System Diseases) Lowe Oculocerebrorenal Syndrome (Rare Diseases / Metabolic Disorders) Lower Cervical Spine Fractures (Orthopedic Surgery / Spine) Lower Cervical Spine Fractures (Neurology / Neurologic Emergencies) Lower Extremity-predominant 1 Autosomal Dominant Spinal Muscular Atrophy (Rare Diseases / Nervous System Diseases) Lower Extremity Amputation (Procedures / Musculoskeletal) Lower Eyelid Laxity Blepharoplasty (Ophthalmology / Lid) Lower Gastrointestinal Bleeding (Gastroenterology / Systemic Disease) Lower Respiratory Tract Infections (Infectious Disease / Lower Respiratory Tract Infections) Low Gamma-gt Familial Intrahepatic Cholestasis (Rare Diseases / Metabolic Disorders) Low Grade Cartilage Tumors (Orthopedic Surgery / Neoplasms) Lowry Maclean Syndrome (Rare Diseases / Nervous System Diseases) Lowry Maclean Syndrome (Rare Diseases / Musculoskeletal Diseases) Lowry Maclean Syndrome (Rare Diseases / Eye Diseases) Lowry Wood Syndrome (Rare Diseases / Musculoskeletal Diseases) Low Vision Rehabilitation (Procedures / Eye Procedures) LSD Toxicity (Emergency Medicine / Toxicologic) Lubinsky Syndrome (Rare Diseases / Male Reproductive Diseases) Lubinsky Syndrome (Rare Diseases / Endocrine Diseases) Lubinsky Syndrome (Rare Diseases / Eye Diseases) Lucey-Driscoll Syndrome (Rare Diseases / Digestive Diseases) Lujan Syndrome (Rare Diseases / Nervous System Diseases) Lumbar Compression Fracture (Physiatry / Lumbar Spine Disorders) Lumbar Degenerative Disk Disease (Physiatry / Lumbar Spine Disorders) Lumbar Disc Disease (Orthopedic Surgery / Spine) Lumbar Disc Disease (Neurosurgery / Spine) Lumbar Disk Disorders (Emergency Medicine / Orthopedic Trauma) Lumbar Disk Problems (Sports Medicine / Spine) Lumbar Facet Arthropathy (Physiatry / Lumbar Spine Disorders) Lumbar Malsegmentation Short Stature (Rare Diseases / Miscellaneous) Lumbar Puncture (Emergency Medicine / Obstetric & Gynecologic) Lumbar Puncture (Procedures / Brain & Spinal Cord) Lumbar Spine Dislocations (Orthopedic Surgery / Spine) Lumbar Spine Disorders (Physiatry / Lumbar Spine Disorders) Lumbar Spine Fractures (Neurology / Neurologic Emergencies) Lumbar Spondylolysis (Physiatry / Lumbar Spine Disorders) Lumbar Spondylosis (Neurosurgery / Spine) Lumbar Spondylosis (Orthopedic Surgery / Spine) Lumbosacral Injuries (Sports Medicine / Spine) Lumpectomy (Oncology / Breast Cancer) Lumpectomy (Procedures / Skin & Soft Tissue) Lung Abscess (Infectious Disease / Lower Respiratory Tract Infections) Lung Abscess (Pulmonology / Infectious Lung Diseases) Lung Adenocarcinoma (Rare Diseases / Rare Cancers) Lung Adenocarcinoma (Oncology / Lung & Thoracic Cancers) Lung Agenesis (Rare Diseases / Lung Diseases) Lung Cancer (Family Medicine / Pulmonary Disorders) Lung Cancer (Internal Medicine / Pulmonary Disorders) Lung Cancer (Pharmacy / Pulmonary Disorders) Lung Cancer (NP/PA Practice / Pulmonary Disorders) Lung Cancer Biomarkers (Oncology / Lung & Thoracic Cancers) Lung Cancer Chemotherapy (Oncology / Lung & Thoracic Cancers) Lung Cancer Guidelines (Oncology / Lung & Thoracic Cancers) Lung Cancer Imaging (Oncology / Lung & Thoracic Cancers) Lung Cancer Immunotherapy (Oncology / Lung & Thoracic Cancers) Lung Cancer Risk Factors (Oncology / Lung & Thoracic Cancers) Lung Cancer Staging (Oncology / Lung & Thoracic Cancers) Lung Pathology (Pathology / Pulmonary) Lung Transplantation (Procedures / Transplantation) Lung Tumors (Thoracic Surgery / Tumors) Lung Tumors (Pulmonology / Lung Tumors) Lupus (Rheumatology / Lupus) Lupus (Rare Diseases / Immune System Diseases) Lupus Erythematosus Tumidus (Rare Diseases / Skin Diseases) Lupus Nephritis (Rare Diseases / Kidney & Urinary Diseases) Lupus Nephritis (Rheumatology / Systemic Rheumatic Disease) Lupus Nephritis (Orthopedic Surgery / Systemic Diseases) Luteal Phase Dysfunction (Endocrinology & Diabetes / Gonadal Conditions) Luteinizing Hormone Deficiency (Endocrinology & Diabetes / Gonadal Conditions) Lyme Disease (Infectious Disease / Bacterial Infections) Lyme Disease (Rare Diseases / Nervous System Diseases) Lyme Disease (Rheumatology / Infectious Arthritis) Lyme Disease (Rheumatology / Lyme Disease) Lyme Disease (Rare Diseases / Bacterial Infections) Lymphadenopathy (Family Medicine / Multisystem Disorders) Lymphadenopathy (Pharmacy / Multisystem Disorders) Lymphadenopathy (Internal Medicine / Multisystem Disorders) Lymphadenopathy (NP/PA Practice / Multisystem Disorders) Lymphangiectasia (Rare Diseases / Blood Diseases) Lymphangiectasia (Dermatology / Vessels Diseases) Lymphangioendothelioma (Dermatology / Vessels Diseases) Lymphangioleiomyomatosis (Pulmonology / Idiopathic Lung Disorders) Lymphangioleiomyomatosis (Rare Diseases / Lung Diseases) Lymphangioleiomyomatosis Imaging (Rare Diseases / Benign Neoplasms) Lymphangioma (Dermatology / Vessels Diseases) Lymphatic Filariasis (Rare Diseases / Parasitic Diseases) Lymphedema (Rare Diseases / Blood Diseases) Lymphedema (Dermatology / Vessels Diseases) Lymphedema & Cerebral Arteriovenous Anomaly (Rare Diseases / Heart Diseases) Lymphedema & Cerebral Arteriovenous Anomaly (Rare Diseases / Skin Diseases) Lymphedema, Microcephaly & Chorioretinopathy Syndrome (Rare Diseases / Miscellaneous) Lymphedema-distichiasis Syndrome (Rare Diseases / Skin Diseases) Lymphedema-distichiasis Syndrome (Rare Diseases / Blood Diseases) Lymphedema-distichiasis Syndrome (Rare Diseases / Eye Diseases) Lymph Node Neoplasm (Rare Diseases / Rare Cancers) Lymphoblastic Lymphoma (Hematology / Stem Cell Disorders) Lymphoblastic Lymphoma (Rare Diseases / Rare Cancers) Lymphoblastic Lymphoma (Oncology / Hematologic Cancers) Lymphocytic Hypophysitis (Rare Diseases / Immune System Diseases) Lymphocytic Infiltrate of Jessner (Rare Diseases / Skin Diseases) Lymphocytic Interstitial Pneumonia (Pulmonology / Interstitial Lung Diseases) Lymphocytic Interstitial Pneumonia (Emergency Medicine / Pulmonary) Lymphocytic Vasculitis (Rare Diseases / Heart Diseases) Lymphogranuloma Venereum (Infectious Disease / Sexually Transmitted Diseases (STDs)) Lymphogranuloma Venereum (Urology / Infections & Inflammatory Conditions) Lymphoma (Hematology / Lymphoma) Lymphoma AIDS Related (Rare Diseases / Rare Cancers) Lymphomas (NP/PA Practice / Hematologic Disorders) Lymphomas (Internal Medicine / Hematologic Disorders) Lymphomas (Pharmacy / Hematologic Disorders) Lymphomas (Family Medicine / Hematologic Disorders) Lymphomas of the Head & Neck (Oncology / Head & Neck Cancers) Lymphomatoid Granulomatosis (Rare Diseases / Blood Diseases) Lymphomatoid Granulomatosis (Pulmonology / Idiopathic Lung Disorders) Lymphomatoid Papulosis (Oncology / Skin Cancers) Lymphomatoid Papulosis (Rare Diseases / Rare Cancers) Lymphomatoid Papulosis (Dermatology / Lymphoma & Related) Lymphomatoid Papulosis (Rare Diseases / Blood Diseases) Lymphomatoid Papulosis (Rare Diseases / Skin Diseases) Lymphoproliferative Disorders (Hematology / Lymphoproliferative Disorders) Lymphosarcoma (Rare Diseases / Rare Cancers) Lymphoscintigraphy (Procedures / Diagnostic Imaging) Lynch Syndrome (Rare Diseases / Digestive Diseases) Lynch Syndrome (Rare Diseases / Female Reproductive Diseases) Lynch Syndrome (Rare Diseases / Rare Cancers) Lynch Syndrome (Rare Diseases / Hereditary Cancer Syndromes) Lysinuric Protein Intolerance (Rare Diseases / Metabolic Disorders) Lysosomal Storage Disease (Neurology / Pediatric Neurology) Lysosomal Storage Disease (Rare Diseases / Endocrine Diseases)