This is a list of diseases starting with the letter "L".

La

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Lab–Lam

  • Labrador lung
  • Labyrinthitis
  • Lachiewicz–Sibley syndrome
  • Lacrimo-auriculo-dento-digital syndrome
  • Lactate dehydrogenase deficiency type A
  • Lactate dehydrogenase deficiency type B
  • Lactate dehydrogenase deficiency type C
  • Lactate dehydrogenase deficiency
  • Lactic acidosis congenital infantile
  • Ladda–Zonana–Ramer syndrome
  • Lafora disease
  • Lagophthalmia cleft lip palate
  • Lambdoid synostosis familial
  • Lambert syndrome
  • Lambert–Eaton myasthenic syndrome (Lambert–Eaton paraneoplastic cerebellar degeneration)
  • Lambert–Eaton syndrome
  • Lamellar ichthyosis
  • Lamellar recessive ichthyosis

Lan–Lap

  • Landau–Kleffner syndrome
  • Landouzy–Dejerine muscular dystrophy
  • Landy–Donnai syndrome
  • Langdon Down
  • Langer–Nishino–Yamaguchi syndrome
  • Langer–Giedion syndrome
  • Langerhans cell granulomatosis
  • Langerhans cell histiocytosis
  • Laparoschisis
  • Laplane–Fontaine–Lagardere syndrome

Lar–Lat

  • Large B-cell diffuse lymphoma
  • Laron-type dwarfism
  • Larsen-like osseous dysplasia dwarfism
  • Larsen-like syndrome lethal type
  • Larsen syndrome craniosynostosis
  • Larsen syndrome, dominant type
  • Larsen syndrome, recessive type
  • Larsen syndrome
  • Laryngeal abductor paralysis mental retardation
  • Laryngeal carcinoma
  • Laryngeal cleft
  • Laryngeal neoplasm
  • Laryngeal papillomatosis
  • Laryngeal web congenital heart disease short stature
  • Laryngocele
  • Laryngomalacia dominant congenital
  • Laryngomalacia
  • Larynx atresia
  • Lassa fever
  • Lassueur–Graham–Little syndrome
  • Late onset dominant cone dystrophy
  • Lateral body wall defect
  • Laterality defects dominant
  • Lattice corneal dystrophy type 2

Lau–Lax

  • Launois–Bensaude adenolipomatosis
  • Laurence–Prosser–Rocker syndrome
  • Laurence–Moon–Bardet–Biedl syndrome
  • Laurin–Sandrow syndrome
  • Laxova–Brown–Hogan syndrome

Lb–Lc

  • LBWC - amniotic bands
  • LBWD syndrome
  • LCHAD deficiency

Le

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Lea–Leh

  • Lead poisoning
  • Leao Ribeiro Da Silva syndrome
  • Learman syndrome
  • Leber military aneurysm
  • Leber optic atrophy
  • Leber's disease
  • Lecithin cholesterol acyltransferase deficiency
  • Ledderhose disease
  • Lee–Root–Fenske syndrome
  • Left ventricle-aorta tunnel
  • Left ventricular hypertrophy
  • Leg absence deformity cataract
  • Legg–Calvé–Perthes syndrome
  • Legionellosis
  • syn: Legionnaires' disease
  • Lehman syndrome

Lei–Ler

  • Leichtman–Wood–Rohn syndrome
  • Leifer–Lai–Buyse syndrome
  • Leigh disease
  • Leigh syndrome, French Canadian type
  • Leiner disease
  • Leiomyoma
  • Leiomyomatosis familial
  • Leiomyomatosis of oesophagus cataract hematuria
  • Leiomyosarcoma
  • Leipala–Kaitila syndrome
  • Leishmaniasis
  • Leisti–Hollister–Rimoin syndrome
  • Lemierre's syndrome
  • Lennox–Gastaut syndrome
  • Lentiginosis in context of NF
  • Lenz–Majewski hyperostotic dwarfism
  • Lenz microphthalmia syndrome
  • Leprechaunism
  • Leprosy
  • Leptomeningeal capillary - venous angiomatosis
  • Leptospirosis
  • Leri pleonosteosis
  • Léri–Weill dyschondrosteosis

Les–Let

  • Lesch–Nyhan syndrome
  • Lethal chondrodysplasia Moerman type
  • Lethal chondrodysplasia Seller type
  • Lethal congenital contracture syndrome
  • Letterer–Siwe disease

Leu–Lev

  • Leucinosis
  • Leukemia subleukemic
  • Leukemia, B-Cell, chronic
  • Leukemia, Myeloid
  • Leukemia, T-Cell, chronic
  • Leukemia
  • Leukocyte adhesion deficiency syndrome
  • Leukocyte adhesion deficiency type 2
  • Leukocytoclastic angiitis
  • Leukodystrophy reunion type
  • Leukodystrophy, globoid cell
  • Leukodystrophy, metachromatic
  • Leukodystrophy, pseudometachromatic
  • Leukodystrophy, Sudanophilic
  • Leukodystrophy
  • Leukoencephalopathy palmoplantar keratoderma
  • Leukomalacia
  • Leukomelanoderma mental retardation hypotrichosis
  • Leukoplakia
  • Levator syndrome
  • Levic–Stefanovic–Nikolic syndrome
  • Levine–Crichley syndrome

Lew–Ley

  • Lewandowski–Kikolich syndrome
  • Lewis–Pashayan syndrome
  • Leydig cells hypoplasia

Lg–Lh

  • LGCR
  • LGS
  • Lhermitte–Duclos disease

Li

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Lic–Lin

  • Lichen myxedematosus
  • Lichen planus follicularis
  • Lichen planus
  • Lichen sclerosus et atrophicus
  • Lichen spinulosus
  • Lichstenstein syndrome
  • Lida–Kannari syndrome
  • Liddle syndrome
  • Li–Fraumeni syndrome
  • Light chain disease
  • Ligyrophobia
  • Limb deficiencies distal micrognathia
  • Limb dystonia
  • Limb reduction defect
  • Limb scalp and skull defects
  • Limb transversal defect cardiac anomaly
  • Limb-body wall complex
  • Limb-girdle muscular dystrophy
  • Lindsay–Burn syndrome
  • Lindstrom syndrome
  • Linear hamartoma syndrome
  • Linear nevus syndrome

Lip–Lis

  • Lip lit syndrome
  • Lipid storage myopathy
  • Lipidosis with triglyceride storage disease
  • Lipoamide dehydrogenase deficiency
  • Lipodystrophy Rieger anomaly diabetes
  • Lipodystrophy
  • Lipogranulomatosis
  • Lipoid congenital adrenal hyperplasia
  • Lipoid proteinosis of Urbach and Wiethe
  • Lipomatosis central non-encapsulated
  • Lipomatosis familial benign cervical
  • Lipomucopolysaccharidosis
  • Lipoprotein disorder
  • Liposarcoma
  • Lisker–Garcia–Ramos syndrome
  • Lison–Kornbrut–Feinstein syndrome
  • Lissencephaly immunodeficiency
  • Lissencephaly syndrome type 1
  • Lissencephaly syndrome type 2
  • Lissencephaly, isolated
  • Lissencephaly
  • Listeria infection
  • Listeriosis

Lit–Liv

  • Livedoid dermatitis
  • Liver cirrhosis
  • Liver neoplasms

Lo

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Lob–Lou

  • Lobar atrophy of brain
  • Lobster hand
  • Lobstein disease
  • Localized epiphyseal dysplasia
  • Locked-in syndrome
  • Lockwood–Feingold syndrome
  • Loffredo–Cennamo–Cecio syndrome
  • Logic syndrome
  • Loiasis
  • Loin pain hematuria syndrome
  • Long QT Syndrome
  • Long QT syndrome type 1
  • Long QT syndrome type 2
  • Long QT syndrome type 3
  • Loose anagen hair syndrome
  • Loose anagen syndrome
  • Lopes–Gorlin syndrome
  • Lopes–Marques de Faria syndrome
  • Lopez–Hernandez syndrome
  • Lou Gehrig's disease
  • Louis–Bar syndrome

Low

  • Low birth weight dwarfism dysgammaglobulinemia
  • Lowe–Kohn–Cohen syndrome
  • Lowe oculocerebrorenal syndrome
  • Lowe syndrome
  • Lower limb anomaly ureteral obstruction
  • Lower limb deficiency hypospadias
  • Lower mesodermal defects
  • Lowry–MacLean syndrome
  • Lowry syndrome
  • Lowry–Wood syndrome
  • Lowry–Yong syndrome

Ls–Lt

  • LSA
  • L-transposition and ccTGA

Lu

  • Lubani Al Saleh Teebi syndrome
  • Lubinsky syndrome
  • Lucey–Driscoll syndrome
  • Lucky–Gelehrter syndrome
  • Ludomania
  • Lúes Congénita
  • Lujan–Fryns syndrome
  • Lumbar malsegmentation short stature
  • Lumbar spinal stenosis
  • Lundberg syndrome
  • Lung agenesis heart defect thumb anomalies
  • Lung cancer
  • Lung herniation congenital defect of sternem
  • Lung neoplasm
  • Lupus anticoagulant, familial
  • Lupus erythematosus
  • Lurie–Kletsky syndrome
  • Luteinizing hormone releasing hormone, deficiency of with ataxia
  • Lutz–Richner–Landolt syndrome
  • Lutz–Lewandowsky epidermodysplasia verruciformis

Ly

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Lye–Lyg

  • Lyell's syndrome
  • Lygophobia

Lym

Lyme

  • Lyme disease

Lymp

Lymph
  • Lymph node neoplasm
Lympha–Lymphe
  • Lymphadenopathy, angioimmunoblastic with dysproteinemia
  • Lymphangiectasies lymphoedema type Hennekam type
  • Lymphangiectasis
  • Lymphangioleiomyomatosis
  • Lymphangiomatosis, pulmonary
  • Lymphangiomyomatosis
  • Lymphatic filariasis
  • Lymphatic neoplasm
  • Lymphedema distichiasis
  • Lymphedema hereditary type 1
  • Lymphedema hereditary type 2
  • Lymphedema ptosis
  • Lymphedema, congenital
  • Lymphedema
  • Lymphedema–distichiasis syndrome
Lympho
  • Lymphoblastic lymphoma
  • Lymphocytes reduced or absent
  • Lymphocytic colitis
  • Lymphocytic infiltrate of Jessner
  • Lymphocytic vasculitis
  • Lymphoid hamartoma
  • Lymphoma, AIDS-related
  • Lymphoma, gastric non-Hodgkin's type
  • Lymphoma, large-cell, immunoblastic
  • Lymphoma, large-cell
  • Lymphoma, small cleaved-cell, diffuse
  • Lymphoma, small cleaved-cell, follicular
  • Lymphoma
  • Lymphomatoid granulomatosis
  • Lymphomatoid Papulosis (LyP)
  • Lymphomatous thyroiditis
  • Lymphosarcoma

Lyn–Lys

  • Lynch–Lee–Murday syndrome
  • Lynch–Bushby syndrome
  • Lyngstadaas syndrome
  • LyP (lymphomatoid papulosis)
  • Lysine alpha-ketoglutarate reductase deficiency
  • Lysinuric protein intolerance
  • Lysosomal alpha-D-mannosidase deficiency
  • Lysosomal beta-mannosidase deficiency
  • Lysosomal glycogen storage disease with normal acid maltase activity
  • Lysosomal storage disease