

L | |
| Labyrinthitis | ADAM Health Illustrated Encyclopedia |
| Labyrinthitis - Children's Encyclopedia | Gale Encyclopedia of Children's Health |
| Labyrinthitis - General Health | Gale Encyclopedia of Medicine |
| Lack of intrinsic factor | ADAM Health Illustrated Encyclopedia |
| Lacquer | ADAM Health Illustrated Encyclopedia |
| Lacrimal Duct Obstruction - General Health | Gale Encyclopedia of Medicine |
| Lacrimal gland tumor | ADAM Health Illustrated Encyclopedia |
| Lactic acidosis | ADAM Health Illustrated Encyclopedia |
| Lactose intolerance | ADAM Health Illustrated Encyclopedia |
| Lactose Intolerance - Children's Encyclopedia | Gale Encyclopedia of Children's Health |
| Lactose Intolerance - General Health | Gale Encyclopedia of Medicine |
| Lactose Intolerance - Nutrition Encyclopedia | Gale Nutrition and Well-Being A to Z |
| Lambert-Eaton Myasthenic Syndrome - Neurological Encyclopedia | Gale Encyclopedia of Neurological Disorders |
| Lambert-Eaton syndrome | ADAM Health Illustrated Encyclopedia |
| Lamellar ichthyosis | ADAM Health Illustrated Encyclopedia |
| Langer-Giedion syndrome - Genetic Encyclopedia I | Gale Encyclopedia of Genetic Disorders Part I |
| Language Disorders - Children's Encyclopedia | Gale Encyclopedia of Children's Health |
| Language Disorders - Nursing Encyclopedia | Gale Encyclopedia of Nursing and Allied Health |
| Larsen syndrome - Genetic Encyclopedia I | Gale Encyclopedia of Genetic Disorders Part I |
| Larsen Syndrome - Genetic Encyclopedia II | Gale Encyclopedia of Genetic Disorders Part II |
| Laryngeal Cancer - Cancer Encyclopedia | Gale Encyclopedia of Cancer |
| Laryngeal Cancer - General Health | Gale Encyclopedia of Medicine |
| Laryngeal nerve damage | ADAM Health Illustrated Encyclopedia |
| Laryngeal Nerve Palsy - Cancer Encyclopedia | Gale Encyclopedia of Cancer |
| Laryngitis | ADAM Health Illustrated Encyclopedia |
| Laryngitis - Alternative Medicine | Gale Encyclopedia of Alternative Medicine |
| Laryngitis - General Health | Gale Encyclopedia of Medicine |
| Lateral collateral ligament (LCL) injury | ADAM Health Illustrated Encyclopedia |
| Laterality Sequence - Genetic Encyclopedia II | Gale Encyclopedia of Genetic Disorders Part II |
| Laxative overdose | ADAM Health Illustrated Encyclopedia |
| Lazy Eye - Alternative Medicine | Gale Encyclopedia of Alternative Medicine |
| Lead poisoning | ADAM Health Illustrated Encyclopedia |
| Lead Poisoning - Alternative Medicine | Gale Encyclopedia of Alternative Medicine |
| Lead Poisoning - Children and Adolescents | Gale Encyclopedia of Childhood and Adolescence |
| Lead Poisoning - Children's Encyclopedia | Gale Encyclopedia of Children's Health |
| Lead Poisoning - General Health | Gale Encyclopedia of Medicine |
| Lead Poisoning - Nutrition Encyclopedia | Gale Nutrition and Well-Being A to Z |
| Learning Disability - Children and Adolescents | Gale Encyclopedia of Childhood and Adolescence |
| Learning Disorders - Alternative Medicine | Gale Encyclopedia of Alternative Medicine |
| Learning Disorders - Children's Encyclopedia | Gale Encyclopedia of Children's Health |
| Learning Disorders - General Health | Gale Encyclopedia of Medicine |
| Learning disorders - Mental Health Encyclopedia | Gale Encyclopedia of Mental Disorders |
| Learning Disorders - Neurological Encyclopedia | Gale Encyclopedia of Neurological Disorders |
| Leber congenital amaurosis - Genetic Encyclopedia I | Gale Encyclopedia of Genetic Disorders Part I |
| Leber Congenital Amaurosis - Genetic Encyclopedia II | Gale Encyclopedia of Genetic Disorders Part II |
| Lebers hereditary optic atrophy - Genetic Encyclopedia I | Gale Encyclopedia of Genetic Disorders Part I |
| Lebers Hereditary Optic Atrophy - Genetic Encyclopedia II | Gale Encyclopedia of Genetic Disorders Part II |
| Left-sided heart failure | ADAM Health Illustrated Encyclopedia |
| Legg-Calve-Perthes disease | ADAM Health Illustrated Encyclopedia |
| Legionnaire's disease | ADAM Health Illustrated Encyclopedia |
| Legionnaires' Disease - General Health | Gale Encyclopedia of Medicine |
| Leigh Disease - Neurological Encyclopedia | Gale Encyclopedia of Neurological Disorders |
| Leigh syndrome - Genetic Encyclopedia I | Gale Encyclopedia of Genetic Disorders Part I |
| Leigh Syndrome - Genetic Encyclopedia II | Gale Encyclopedia of Genetic Disorders Part II |
| Leiomyosarcoma | ADAM Health Illustrated Encyclopedia |
| Leiomyosarcoma - Cancer Encyclopedia | Gale Encyclopedia of Cancer |
| Leishmaniasis | ADAM Health Illustrated Encyclopedia |
| Leishmaniasis - Public Health Encyclopedia | Gale Encyclopedia of Public Health |
| Leishmaniasis - General Health | Gale Encyclopedia of Medicine |
| Lennox-Gastaut Syndrome - Neurological Encyclopedia | Gale Encyclopedia of Neurological Disorders |
| Leprosy | ADAM Health Illustrated Encyclopedia |
| Leprosy - Public Health Encyclopedia | Gale Encyclopedia of Public Health |
| Leprosy - General Health | Gale Encyclopedia of Medicine |
| Leptospirosis | ADAM Health Illustrated Encyclopedia |
| Leptospirosis - General Health | Gale Encyclopedia of Medicine |
| Leri-Weill dyschondrosteosis - Genetic Encyclopedia I | Gale Encyclopedia of Genetic Disorders Part I |
| Lesch-Nyhan syndrome | ADAM Health Illustrated Encyclopedia |
| Lesch-Nyhan syndrome - Genetic Encyclopedia I | Gale Encyclopedia of Genetic Disorders Part I |
| Lesch-Nyhan Syndrome - Genetic Encyclopedia II | Gale Encyclopedia of Genetic Disorders Part II |
| Lesch-Nyhan Syndrome - General Health | Gale Encyclopedia of Medicine |
| Lesch-Nyhan Syndrome - Neurological Encyclopedia | Gale Encyclopedia of Neurological Disorders |
| Leukemia | ADAM Health Illustrated Encyclopedia |
| Leukemia - Alternative Medicine | Gale Encyclopedia of Alternative Medicine |
| Leukemia - Children and Adolescents | Gale Encyclopedia of Childhood and Adolescence |
| Leukemias, Acute - Children's Encyclopedia | Gale Encyclopedia of Children's Health |
| Leukemias, Acute - General Health | Gale Encyclopedia of Medicine |
| Leukemias, Acute - Nursing Encyclopedia | Gale Encyclopedia of Nursing and Allied Health |
| Leukemias, Chronic - Children's Encyclopedia | Gale Encyclopedia of Children's Health |
| Leukemias, Chronic - General Health | Gale Encyclopedia of Medicine |
| Leukemias, Chronic - Nursing Encyclopedia | Gale Encyclopedia of Nursing and Allied Health |
| Leukemoid reaction | ADAM Health Illustrated Encyclopedia |
| Leukocytosis - General Health | Gale Encyclopedia of Medicine |
| Leukodystrophy - Genetic Encyclopedia I | Gale Encyclopedia of Genetic Disorders Part I |
| Leukodystrophy - Genetic Encyclopedia II | Gale Encyclopedia of Genetic Disorders Part II |
| Leukodystrophy - Neurological Encyclopedia | Gale Encyclopedia of Neurological Disorders |
| Leukoencephalopathy - Cancer Encyclopedia | Gale Encyclopedia of Cancer |
| Leukoplakia | ADAM Health Illustrated Encyclopedia |
| Lewy Body Dementia - Neurological Encyclopedia | Gale Encyclopedia of Neurological Disorders |
| Leydig cell tumor | ADAM Health Illustrated Encyclopedia |
| Li-Fraumeni Syndrome - Cancer Encyclopedia | Gale Encyclopedia of Cancer |
| Li-Fraumeni syndrome - Genetic Encyclopedia I | Gale Encyclopedia of Genetic Disorders Part I |
| Li-Fraumeni Syndrome - Genetic Encyclopedia II | Gale Encyclopedia of Genetic Disorders Part II |
| Lice Infestation - Alternative Medicine | Gale Encyclopedia of Alternative Medicine |
| Lice Infestation - Children's Encyclopedia | Gale Encyclopedia of Children's Health |
| Lice Infestation - General Health | Gale Encyclopedia of Medicine |
| Lichen planus | ADAM Health Illustrated Encyclopedia |
| Lichen Planus - General Health | Gale Encyclopedia of Medicine |
| Lichen simplex chronicus | ADAM Health Illustrated Encyclopedia |
| Lichen Simplex Chronicus - General Health | Gale Encyclopedia of Medicine |
| Lily-of-the-valley | ADAM Health Illustrated Encyclopedia |
| Limb-girdle muscular dystrophies | ADAM Health Illustrated Encyclopedia |
| Limb-girdle muscular dystrophy - Genetic Encyclopedia I | Gale Encyclopedia of Genetic Disorders Part I |
| Limb-Girdle Muscular Dystrophy - Genetic Encyclopedia II | Gale Encyclopedia of Genetic Disorders Part II |
| Lip Cancers - Cancer Encyclopedia | Gale Encyclopedia of Cancer |
| Lip moisturizer poisoning | ADAM Health Illustrated Encyclopedia |
| Lipidoses - Children's Encyclopedia | Gale Encyclopedia of Children's Health |
| Lipidoses - General Health | Gale Encyclopedia of Medicine |
| Lisping - Children and Adolescents | Gale Encyclopedia of Childhood and Adolescence |
| Lisping - Children's Encyclopedia | Gale Encyclopedia of Children's Health |
| Lissencephaly - Genetic Encyclopedia I | Gale Encyclopedia of Genetic Disorders Part I |
| Lissencephaly - Genetic Encyclopedia II | Gale Encyclopedia of Genetic Disorders Part II |
| Lissencephaly - Neurological Encyclopedia | Gale Encyclopedia of Neurological Disorders |
| Listeriosis | ADAM Health Illustrated Encyclopedia |
| Listeriosis - Children's Encyclopedia | Gale Encyclopedia of Children's Health |
| Listeriosis - General Health | Gale Encyclopedia of Medicine |
| Lithium toxicity | ADAM Health Illustrated Encyclopedia |
| Liver Cancer - Cancer Encyclopedia | Gale Encyclopedia of Cancer |
| Liver cancer - Genetic Encyclopedia I | Gale Encyclopedia of Genetic Disorders Part I |
| Liver Cancer - General Health | Gale Encyclopedia of Medicine |
| Liver Cancer - Nursing Encyclopedia | Gale Encyclopedia of Nursing and Allied Health |
| Liver disease | ADAM Health Illustrated Encyclopedia |
| Liver Encephalopathy - General Health | Gale Encyclopedia of Medicine |
| Liver metastases | ADAM Health Illustrated Encyclopedia |
| Liver spots | ADAM Health Illustrated Encyclopedia |
| Lobar intracerebral hemorrhage | ADAM Health Illustrated Encyclopedia |
| Locked-in Syndrome - Neurological Encyclopedia | Gale Encyclopedia of Neurological Disorders |
| Long QT Syndrome - Genetic Encyclopedia II | Gale Encyclopedia of Genetic Disorders Part II |
| Long-QT syndrome - Genetic Encyclopedia I | Gale Encyclopedia of Genetic Disorders Part I |
| Lordosis | ADAM Health Illustrated Encyclopedia |
| Lou Gehrig's Disease - Alternative Medicine | Gale Encyclopedia of Alternative Medicine |
| Lowe Oculocerebrorenal Syndrome - Genetic Encyclopedia II | Gale Encyclopedia of Genetic Disorders Part II |
| Lowe syndrome - Genetic Encyclopedia I | Gale Encyclopedia of Genetic Disorders Part I |
| Lower esophageal ring | ADAM Health Illustrated Encyclopedia |
| Lower Esophageal Ring - General Health | Gale Encyclopedia of Medicine |
| Ludwig's angina | ADAM Health Illustrated Encyclopedia |
| Lump in the abdomen | ADAM Health Illustrated Encyclopedia |
| Lung Abscess - General Health | Gale Encyclopedia of Medicine |
| Lung cancer | ADAM Health Illustrated Encyclopedia |
| Lung Cancer - Public Health Encyclopedia | Gale Encyclopedia of Public Health |
| Lung Cancer - Alternative Medicine | Gale Encyclopedia of Alternative Medicine |
| Lung Cancer - Nursing Encyclopedia | Gale Encyclopedia of Nursing and Allied Health |
| Lung cancer - non-small cell | ADAM Health Illustrated Encyclopedia |
| Lung cancer - small cell | ADAM Health Illustrated Encyclopedia |
| Lung Cancer, Non-Small Cell - Cancer Encyclopedia | Gale Encyclopedia of Cancer |
| Lung Cancer, Non-Small Cell - General Health | Gale Encyclopedia of Medicine |
| Lung Cancer, Small Cell - Cancer Encyclopedia | Gale Encyclopedia of Cancer |
| Lung Cancer, Small Cell - General Health | Gale Encyclopedia of Medicine |
| Lung Development and Breathing Disorders - Children and Adolescents | Gale Encyclopedia of Childhood and Adolescence |
| Lung disease | ADAM Health Illustrated Encyclopedia |
| Lung Diseases Due to Gas or Chemical Exposure - General Health | Gale Encyclopedia of Medicine |
| Lupus - Neurological Encyclopedia | Gale Encyclopedia of Neurological Disorders |
| Lupus nephritis | ADAM Health Illustrated Encyclopedia |
| Lyme disease | ADAM Health Illustrated Encyclopedia |
| Lyme Disease - Alternative Medicine | Gale Encyclopedia of Alternative Medicine |
| Lyme Disease - Children's Encyclopedia | Gale Encyclopedia of Children's Health |
| Lyme Disease - General Health | Gale Encyclopedia of Medicine |
| Lyme Disease - Neurological Encyclopedia | Gale Encyclopedia of Neurological Disorders |
| Lyme disease - chronic persistent | ADAM Health Illustrated Encyclopedia |
| Lyme disease - early disseminated | ADAM Health Illustrated Encyclopedia |
| Lyme disease - primary | ADAM Health Illustrated Encyclopedia |
| Lymphadenitis | ADAM Health Illustrated Encyclopedia |
| Lymphadenitis - Children's Encyclopedia | Gale Encyclopedia of Children's Health |
| Lymphadenitis - General Health | Gale Encyclopedia of Medicine |
| Lymphangitis | ADAM Health Illustrated Encyclopedia |
| Lymphatic System - Children and Adolescents | Gale Encyclopedia of Childhood and Adolescence |
| Lymphatic System - Nursing Encyclopedia | Gale Encyclopedia of Nursing and Allied Health |
| Lymphedema - General Health | Gale Encyclopedia of Medicine |
| Lymphocytic Choriomeningitis - General Health | Gale Encyclopedia of Medicine |
| Lymphocytopenia - General Health | Gale Encyclopedia of Medicine |
| Lymphogranuloma venereum | ADAM Health Illustrated Encyclopedia |
| Lymphogranuloma Venereum - General Health | Gale Encyclopedia of Medicine |
| Lymphoid hyperplasia | ADAM Health Illustrated Encyclopedia |
| Lymphoma - Cancer Encyclopedia | Gale Encyclopedia of Cancer |