Lung Cancer Low birth weight Liver Transplantation Lung and Heart-Lung Transplantation Large for Gestational Age (LGA) Long QT Syndrome Learning Disorders Laryngeal Papillomas Legg-Calvé-Perthes Disease Lipid Metabolism L1 Syndrome Laband Syndrome Lactose Intolerance LADD Syndrome Lambert-Eaton Myasthenic Syndrome Landau Kleffner Syndrome Langerhans Cell Histiocytosis Laron Syndrome Larsen Syndrome Laurence Moon Syndrome Leber's Congenital Amaurosis Leber Hereditary Optic Neuropathy Legg Calve Perthes Disease Legionnaires' Disease Leigh's Disease Leiomyosarcoma, General Lennox Gastaut Syndrome Lenz Microphthalmia Syndrome LEOPARD Syndrome Leprechaunism Leprosy Leptospirosis Leri Pleonosteosis Lesch Nyhan Syndrome Leukemia, Chronic Lymphocytic Leukemia, Chronic Myelogenous Leukemia, Hairy Cell Leukocyte Adhesion Deficiency Syndromes Leukodystrophy, Krabbe's Leukodystrophy, Metachromatic Leukodystrophy Levy-Yeboa Syndrome Lichen Planus Lichen Sclerosus Lipodystrophy Lissencephaly Listeriosis Locked In Syndrome Loken Senior Syndrome Lowe Syndrome Lupus Lyme Disease Lymphadenopathy, Angioimmunoblastic with Dysproteinemia Lymphangioleiomyomatosis Lymphatic Malformations Lymphedema-Distichiasis Syndrome Lymphedema, Hereditary Lymphocytic Infiltrate of Jessner Lymphoma, Gastric, Non Hodgkins Type Lynch Syndrome Lysosomal Storage Disorders