Please use the index below to access the condition you require information on. It may take longer to find what you are looking for this way compared with our "search this site" facility in the navigator on the left but we try to point you in the most appropriate direction using this index and therefore the results should be better. For speed, this index has been split into separate alphabetical files:

Contact a Family also has information on many other specific conditions and rare disorders. If you cannot find the information you require in The Contact a Family Directory Online, you may wish to use our Contact a Family Helpline service.

LCA see Leber's Congenital Amaurosis
LCAD see Fatty Acid Oxidation Disorders
LCH see Histiocytosis
LCHAD see Fatty Acid Oxidation Disorders
LEMS see Myasthenia Gravis and other Myasthenic syndromes
LFL see Li-Fraumeni syndrome
LFS see Li-Fraumeni syndrome
LIMD see Mitochondrial Cytopathies and related disorders
LOTS see Tay Sachs disease
Lactic Acidosis see Metabolic diseases and see Mitochondrial Cytopathies and related disorders
Lafora Body disease see Metabolic diseases
Lambert-Eaton Myasthenia syndrome see Myasthenia Gravis and other Myasthenic syndromes
Lamellar Ichthyosis see Ichthyosis
Landau-Kleffner syndrome
Landouzy-Dejerine see Facioscapulohumeral Muscular Dystrophy
Landry's Ascending Paralysis see Guillain-Barré syndrome
Langer-Giedion syndrome
Langerhans Cell Histiocytosis see Histiocytosis
Language Disorder see Speech and Language Impairment
Larsen syndrome
Laryngeal Dystonia see Dystonia
Late Onset Tay Sachs disease see Tay Sachs disease
Laurence-Moon-Bardet-Biedl see Bardet-Biedl syndrome
Laurence-Moon-Biedl see Bardet-Biedl syndrome
Learning Disability
Learning Problem see Dyslexia
Leber's Amaurosis see Leber's Congenital Amaurosis
Leber's Congenital Amaurosis
Leber's Hereditary Optic Neuropathy
Leber's Optic Atrophy see Leber's Hereditary Optic Neuropathy
Leber's Optic Neuropathy see Leber's Hereditary Optic Neuropathy
Leg length discrepancy see Lower Limb abnormalities
Legg-Calve-Perthes disease see Perthes disease
Leigh's disease see Leigh syndrome
Leigh's Encephalopathy see Leigh syndrome
Leigh syndrome
Lejeune syndrome see Cri du Chat syndrome
Lennox-Gastaut syndrome
Leprechaunism see Metabolic diseases
Leroy syndrome (ML II) see Mucopolysaccharide diseases and associated diseases
Lesch Nyhan syndrome
Lethal Infantile Mitochondrial disease see Mitochondrial Cytopathies and related disorders
Letterer Siwe disease see Histiocytosis
Leukaemia and other allied blood disorders
Leukocyte Adhesion Defect Type II see Congenital Disorders of Glycosylation
Leukodystrophy see Metabolic diseases
Levine-Critchley syndrome see Neuroacanthocytosis disorders
Li-Fraumeni syndrome
Limb Girdle Dystrophy see Muscular Dystrophy and neuromuscular disorders
Limb Reduction Defects see Lower Limb Abnormalities
Limbic encephalitis see Encephalitis
Lipodystrophy see Metabolic diseases
Lissencephaly see Cortical Malformations
Liver disease
Lobar HPE see Holoprosencephaly
Localised Nodular Myosotis see Muscular Dystrophy and neuromuscular disorders
Long Chain Acyl Deficiency see Fatty Acid Oxidation Disorders
Long Chain Hydroxyacyl-CoA Dehydrogenase (LCHAD) Deficiency see Fatty Acid Oxidation Disorders
Long QT syndrome
Louping ill Virus see Arboviral Encephalitides
Lowe syndrome
Lower Limb Abnormalities
Lower Limb Deficiency see Lower Limb Abnormalities
Lower limb reduction defects see Lower Limb abnormalities
Lub's syndrome see Androgen Insensitivity syndrome
Luft disease see Mitochondrial Cytopathies and related disorders
Lung diseases
Lung Transplant see Heart and Heart/Lung Transplant
Lupus
Lymphocytic Interstitial Pneumonitis see HIV Infection and AIDS
Lymphoedema
Lymphoedema-Distichiasis syndrome see Lymphoedema
Lymphoma