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.

JDM see Dermatomyositis and Polymyositis
JPM see Dermatomyositis and Polymyositis
Jackknife Convulsions see West syndrome
Jacobsen syndrome
Jansky-Bielschowsky disease (late infantile Type) see Batten disease
Japanese Encephalitis see Arboviral Encephalitides
Jerking Stiff Person syndrome see Stiff Man syndrome
Jervell-Lange-Nielson syndrome see Long QT syndrome
Job's syndrome see Primary Immunodeficiencies
Joubert syndrome
Junctional EB see Epidermolysis Bullosa
Juvenile Dermatomyositis see Dermatomyositis and Polymyositis
Juvenile Dystonic Lipidosis see Niemann-Pick disease
Juvenile Idiopathic Arthritis see Arthritis (Juvenile Idiopathic)
Juvenile Nephronopthisis see Kidney disease
Osteoporosis (Juvenile)
Juvenile Polymyositis see Dermatomyositis and Polymyositis