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.

NAGS Deficiency see Urea Cycle Disorders
NARP see Mitochondrial Cytopathies and related disorders
NBCCS see Gorlin syndrome
NOMID see Chronic infantile neurologic cutaneous and articular syndrome
NPS see Nail-Patella syndrome
N-acetyl glutamate synthase see Urea Cycle Disorders
Naevus Flammus see Vascular Birthmarks
Nager syndrome
Nail-Patella syndrome
Narcolepsy
Necrotising Fasciitis
Nemaline Myopathy see Muscular Dystrophy and neuromuscular disorders
Neonatal Death see Stillbirths and Neonatal Deaths
Neonatal Haemochromatosis see Liver disease
Neonatal Hepatitis see Liver disease
Neonatal Hypoglycemia-Visceromegaly-Macroglossia-Microcephaly see Beckwith-Wiedemann syndrome
Neonatal Onset Multisystem Inflammatory Disease see Chronic infantile neurologic cutaneous and articular syndrome
Nephrogenic Diabetes Insipidus see Pituitary Disorders
Nephronopthisis see Kidney disease
Nephrotic syndrome
Nesidioblastosis see Congenital Hyperinsulinism
Netherton disease see Netherton syndrome
Netherton syndrome
Neural Tube Defect see Spina Bifida
Neuroacanthocytosis see Neuroacanthocytosis disorders
Neuroacanthocytosis disorders
Neuroblastoma
Neurodevelopmental Regression in Children see Dementia in Children
Neurofibromatosis
Neuronal Ceroid Lipofuscinosis Type 1 (infantile) see Batten disease
Neuronal Ceroid Lipofuscinosis Type 2 (late infantile) see Batten disease
Neuronal Ceroid Lipofuscinosis Type 3 (juvenile) see Batten disease
Neuropathy, Ataxia and Retinitis Pigmentosa see Mitochondrial Cytopathies and related disorders
Neurovisceral Storage disease see Niemann-Pick disease
Neutral Lipid Storage disease see Ichthyosis
Neutropenia (Severe Chronic)
Nevilles disease see Niemann-Pick disease
Nevoid basal cell carcinoma syndrome see Gorlin syndrome
Niemann-Pick disease
Non-Bullous Ichthyosiform Erythroderma see Ichthyosis
Non-Epileptic Seizures see Reflex Anoxic Seizures
Non-Hodgkin's Lymphoma see Lymphoma
Noonan syndrome
Normal Pressure Hydrocephalus
Norman-Roberts syndrome see Cortical malformations
Norrie disease
Nuclear DNA Mutations see Mitochondrial Cytopathies and related disorders
Nystagmus