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.

TAR syndrome
TB see Tuberculosis
TBS see Townes-Brocks syndrome
TPMT see Purine & Pyrimidine Metabolic diseases
TSC see Tuberous Sclerosis
TTP see Thrombotic Thrombocytopenic Purpura
Talipes see Congenital Talipes Equinovarus
Tangier disease see Metabolic diseases
Tauri disease see Glycogen Storage diseases
Tay Sachs disease
T-cell Activation Deficiency see Primary Immunodeficiencies
T-cell Receptor Deficiency see Primary Immunodeficiencies
Telangiectasia see Vascular Birthmarks
Termination of Pregnancy see Fetal Abnormality
Testicular Feminisation see Androgen Insensitivity syndrome
Tetrahydrobiopterin Deficiency see Metabolic diseases
Tetralogy of Fallot see Heart Defects
Tetraplegia see Spinal Injuries
Thalassaemia Major (ß Thalassaemia)
Thiopurine Methyltransferase deficiency/superactivity see Purine & Pyrimidine Metabolic diseases
Thomsen disease see Muscular Dystrophy and neuromuscular disorders
Thrombocytopenia with Absent Radii see TAR syndrome
Thrombotic Thrombocytopenic Purpura
Thymic Aplasia see Primary Immunodeficiencies
Thymoma with Hypogammaglobulinaemia see Primary Immunodeficiencies
Thyroid Associated Ophthalmopathy see Thyroid Eye disease
Thyroid Disorders
Thyroid Eye disease
Thyroid Ophthalmopathy see Thyroid Eye disease
Thyrotoxicosis see Thyroid Disorders
Tibial Hemimelia see Hemimelia
Tibial Torsion see Lower Limb abnormalities
Tic Douloureux see Trigeminal Neuralgia
Tick-Borne Encephalitis see Arboviral Encephalitides
Tinnitus
Torseten Sjögren see Marinesco-Sjögren Syndrome
Torticollis see Dystonia
Tourette syndrome
Townes-Brocks syndrome
Toxic and drug induced neuropathies see Peripheral Neuropathy
Toxocariasis
Toxoplasmosis
Tracheo-Oesophageal Fistula and/or Oesophageal Atresia
Tracheostomy
Transcobalamin II Deficiency see Primary Immunodeficiencies
Transient Hypogammaglobulinaemia of Infancy see Primary Immunodeficiencies
Transient Ischaemic Attack see Stroke
Transposition of Great Arteries see Heart Defects
Transverse Myelitis
Traumatic Mutism see Selective Mutism
Treacher Collins syndrome
Trichodystrophy see Ichthyosis
Trichorhinophalangeal syndrome Type II see Langer-Giedion syndrome
Tricuspid Atresia see Heart Defects
Trifunctional Protein deficiency see Fatty Acid Oxidation Disorders
Trigeminal Neuralgia
Trigonocephaly see Craniofacial Conditions
Trimethylamineuria see Metabolic diseases
Triosephosphate Isomerase Deficiency see Metabolic diseases
Triple-X syndrome
Trisomy 13 see Patau syndrome
Trisomy 18 see Edwards' syndrome
Trisomy 21 see Down syndrome
Trisomy 21 with Heart Defect see Down syndrome with Heart Defect
Tryptophan Malabsorption see Metabolic diseases
Tuberculosis
Tuberous Sclerosis
Turcot syndrome
Turner syndrome
Turner-Kieser syndrome see Nail-Patella syndrome
Turner-Ullrich syndrome see Turner syndrome
Twins with Special Needs/Multiple Births
Tyrosinaemia Type 1 see Liver disease