See Conditions by First Letter (L)
- Labor Pain
- Labyrinth Diseases
- Labyrinthitis
- Lacerations
- Lacrimal Apparatus Diseases
- Lacrimal Duct Obstruction
- Lactate Dehydrogenase A Deficiency
- Lactose Intolerance
- Lafora Disease
- Lambert-Eaton Myasthenic Syndrome
- Lamellar Ichthyosis
- Landau-Kleffner Syndrome
- Langerhans Cell Histiocytosis
- Language Development Disorders
- Language Disorders
- Large B Cell Diffuse Lymphoma
- Large Granular Lymphocyte Leukemia
- Laron Syndrome
- Laryngeal Cancer
- Laryngeal Cleft
- Laryngeal Diseases
- Laryngeal Edema
- Laryngeal Neoplasms
- Laryngeal Papillomatosis
- Laryngismus
- Laryngitis
- Laryngomalacia
- Laryngostenosis
- Lassa Fever
- Lassueur-Graham-Little Syndrome
- Latent Tuberculosis
- Latex Hypersensitivity
- Laurence-Moon Syndrome
- LCAD Deficiency
- LCHAD Deficiency
- Lead Poisoning
- Learning Disorders
- Leber Congenital Amaurosis
- Leber Congenital Amaurosis 2
- Leber Hereditary Optic Neuropathy
- Leber Miliary Aneurysm
- Left Ventricular Noncompaction
- Leg Injuries
- Leg Length Inequality
- Leg Ulcer
- Legg-Calve-Perthes Disease
- Legg-Perthes Disease
- Legionellosis
- Legionnaires' Disease
- Leigh Disease
- Leigh Syndrome
- Leiner Disease
- Leiomyoma
- Leiomyomatosis
- Leiomyomatosis and Renal Cell Cancer, Hereditary
- Leiomyosarcoma
- Leishmaniasis
- Leishmaniasis, Cutaneous
- Leishmaniasis, Mucocutaneous
- Leishmaniasis, Visceral
- Lens Diseases
- Lens Subluxation
- Lentigo
- Lentigo Maligna Melanoma
- Lentivirus Infections
- Leprosy
- Leprosy, Borderline
- Leprosy, Lepromatous
- Leprosy, Multibacillary
- Leptospirosis
- Leriche Syndrome
- Lesch-Nyhan Syndrome
- Leukemia
- Leukemia, B-Cell
- Leukemia, B-cell, Chronic
- Leukemia, Basophilic, Acute
- Leukemia, Biphenotypic, Acute
- Leukemia, Eosinophilic, Acute
- Leukemia, Erythroblastic, Acute
- Leukemia, Hairy Cell
- Leukemia, Large Granular Lymphocytic
- Leukemia, Lymphocytic, Chronic, B-Cell
- Leukemia, Lymphoid
- Leukemia, Mast-Cell
- Leukemia, Megakaryoblastic, Acute
- Leukemia, Monocytic, Acute
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive
- Leukemia, Myeloid
- Leukemia, Myeloid, Accelerated Phase
- Leukemia, Myeloid, Acute
- Leukemia, Myeloid, Chronic, Atypical, BCR-ABL Negative
- Leukemia, Myeloid, Chronic-Phase
- Leukemia, Myelomonocytic, Acute
- Leukemia, Myelomonocytic, Chronic
- Leukemia, Myelomonocytic, Juvenile
- Leukemia, Neutrophilic, Chronic
- Leukemia, Plasma Cell
- Leukemia, Prolymphocytic
- Leukemia, Prolymphocytic, B-Cell
- Leukemia, Prolymphocytic, T-Cell
- Leukemia, Promyelocytic, Acute
- Leukemia, T-Cell
- Leukemia, T-cell, Chronic
- Leukemia-Lymphoma, Adult T-Cell
- Leukocyte Disorders
- Leukocyte-Adhesion Deficiency Syndrome
- Leukodystrophy
- Leukodystrophy, Globoid Cell
- Leukodystrophy, Metachromatic
- Leukoencephalopathies
- Leukoencephalopathy, Progressive Multifocal
- Leukomalacia
- Leukomalacia, Periventricular
- Leukopenia
- Leukoplakia
- Leukoplakia, Hairy
- Leukoplakia, Oral
- Levator Syndrome
- Lewy Body Dementia
- Lewy Body Disease
- Leydig Cell Tumor
- Li-Fraumeni Syndrome
- Lice Infestations
- Lichen Planus
- Lichen Planus Follicularis
- Lichen Planus, Oral
- Lichen Sclerosus
- Lichen Sclerosus et Atrophicus
- Liddle Syndrome
- Light Chain Deposition Disease
- Limb Deformities, Congenital
- Limb-girdle Muscular Dystrophy
- Limb-girdle Muscular Dystrophy Type 2H
- Limb-girdle Muscular Dystrophy, Type 2A
- Limb-girdle Muscular Dystrophy, Type 2B
- Limb-girdle Muscular Dystrophy, Type 2C
- Limbic Encephalitis
- Linitis Plastica
- Lip and Oral Cavity Cancer
- Lip Neoplasms
- Lipid Metabolism Disorders
- Lipid Metabolism, Inborn Errors
- Lipidoses
- Lipodystrophy
- Lipodystrophy, Congenital Generalized
- Lipogranulomatosis
- Lipoma
- Lipomatosis
- Liposarcoma
- Liposarcoma, Myxoid
- Listeria Infection
- Listeriosis
- Lithiasis
- Livedo Reticularis
- Liver Abscess
- Liver Abscess, Amebic
- Liver Abscess, Pyogenic
- Liver Cancer
- Liver Cirrhosis
- Liver Cirrhosis, Alcoholic
- Liver Cirrhosis, Biliary
- Liver Cirrhosis, Experimental
- Liver Diseases
- Liver Diseases, Alcoholic
- Liver Failure
- Liver Failure, Acute
- Liver Neoplasms
- Localized Scleroderma
- Locked-in Syndrome
- Loeys-Dietz Syndrome
- Logopenic Progressive Aphasia
- Loiasis
- Long QT Syndrome
- Long QT Syndrome 1
- Lordosis
- Low Back Pain
- Low Tension Glaucoma
- Lowe Oculocerebrorenal Syndrome
- Lung Abscess
- Lung Diseases
- Lung Diseases, Fungal
- Lung Diseases, Interstitial
- Lung Diseases, Obstructive
- Lung Injury
- Lung Neoplasms
- Lung, Hyperlucent
- Lupus Erythematosus, Cutaneous
- Lupus Erythematosus, Discoid
- Lupus Erythematosus, Systemic
- Lupus Nephritis
- Lupus Vasculitis, Central Nervous System
- Lyme Disease
- Lyme Neuroborreliosis
- Lymph Node Neoplasm
- Lymphadenitis
- Lymphangiectasis
- Lymphangioleiomyomatosis
- Lymphangioma
- Lymphangioma, Cystic
- Lymphangiomatosis
- Lymphangiomyoma
- Lymphangiosarcoma
- Lymphatic Abnormalities
- Lymphatic Diseases
- Lymphatic Filariasis
- Lymphatic Metastasis
- Lymphedema
- Lymphoblastic Lymphoma
- Lymphocele
- Lymphocytic Colitis
- Lymphocytosis
- Lymphohistiocytosis, Hemophagocytic
- Lymphoma
- Lymphoma AIDSrelated
- Lymphoma, AIDS-Related
- Lymphoma, B-Cell
- Lymphoma, B-Cell, Marginal Zone
- Lymphoma, Extranodal NK-T-Cell
- Lymphoma, Follicular
- Lymphoma, Large B-Cell, Diffuse
- Lymphoma, Large-cell
- Lymphoma, Large-Cell, Anaplastic
- Lymphoma, Large-Cell, Immunoblastic
- Lymphoma, Mantle-Cell
- Lymphoma, Non-Hodgkin
- Lymphoma, Primary Cutaneous Anaplastic Large Cell
- Lymphoma, Primary Effusion
- Lymphoma, Small Cleaved-cell, Diffuse
- Lymphoma, Small Cleaved-cell, Follicular
- Lymphoma, T-Cell
- Lymphoma, T-Cell, Cutaneous
- Lymphoma, T-Cell, Peripheral
- Lymphomatoid Granulomatosis
- Lymphomatoid Papulosis
- Lymphomatous Thyroiditis
- Lymphopenia
- Lymphoproliferative Disorders
- Lymphosarcoma
- Lynch Syndrome
- Lysosomal Storage Diseases
- Lysosomal Storage Diseases, Nervous System