This list of rare diseases was originally taken from the NIH public domain resource at http://ord.aspensys.com/asp/diseases/diseases.asp .

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

  • T cell immunodeficiency primary
  • Tabatznik syndrome
  • Tachycardia
  • Taeniasis
  • Takayasu arteritis
  • Talipes equinovarus
  • Tamari Goodman syndrome
  • Tang Hsi Ryu syndrome
  • Tangier disease
  • TAR syndrome
  • Tardive dyskinesia
  • Tarsal tunnel syndrome
  • Taste disorder
  • TAU syndrome
  • Taurodontia absent teeth sparse hair
  • Taurodontism
  • Tay syndrome ichthyosis
  • Taybi Linder syndrome
  • Taybi syndrome
  • Tay-Sachs disease
  • T-cell lymphoma
  • Teebi Kaurah syndrome
  • Teebi Naguib Alawadi syndrome
  • Teebi Shaltout syndrome
  • Teebi syndrome
  • Teeth noneruption of with maxillary hypoplasia and genu valgum
  • Tel Hashomer camptodactyly syndrome
  • Telangiectasia ataxia variant V1
  • Telangiectasia, hereditary hemorrhagic
  • Telangiectasia
  • Telecanthus hypertelorism pes cavus
  • Telecanthus with associated abnormalities
  • Telencephalic leukoencephalopathy
  • Telfer Sugar Jaeger syndrome
  • Temporal epilepsy, familial
  • Temporomandibular ankylosis
  • Temporomandibular joint dysfunction (TMJ)
  • Temtamy Shalash syndrome
  • TEN
  • Ter Haar Hamel Hendricks syndrome
  • Ter Haar syndrome
  • Teratocarcinosarcoma
  • Teratoma
  • Teratophobia
  • Testes neoplasm
  • Testotoxicosis
  • Tetanophobia
  • Tetanus
  • Tethered spinal cord disease
  • Tetraamelia ectodermal dysplasia
  • Tetraamelia multiple malformations
  • Tetraamelia pulmonary hypoplasia
  • Tetraamelia-syrinx
  • Tetrahydrobiopterin deficiencies
  • Tetraploidy
  • Tetrasomy X
  • Thaasophobia
  • Thakker Donnai syndrome
  • Thalamic degeneration symmetrical infantile
  • Thalamic degenerescence infantile
  • Thalamic syndrome
  • Thalassemia major
  • Thalassemia minor
  • Thalassemia
  • Thalassophobia
  • Thanatophobia
  • Thanatophoric dysplasia cloverleaf skull
  • Thanatophoric dysplasia Glasgow variant
  • Thanos Stewart Zonana syndrome
  • Theodor Hertz Goodman syndrome
  • Thiele syndrome
  • Thiemann epiphyseal disease
  • Thies Reis syndrome
  • Thin ribs tubular bones dysmorphism
  • Thiolase deficiency
  • Thiopurine S methyltranferase deficiency
  • Thomas Jewett Raines syndrome
  • Thomas syndrome
  • Thombocytopenia X linked
  • Thompson Baraitser syndrome
  • Thong Douglas Ferrante syndrome
  • Thoracic celosomia
  • Thoracic dysplasia hydrocephalus syndrome
  • Thoracic outlet syndrome
  • Thoraco abdominal enteric duplication
  • Thoraco limb dysplasia Rivera type
  • Thoracolaryngopelvic dysplasia
  • Thoracopelvic dysostosis
  • Thost-Unna palmoplantar keratoderma
  • Thrombasthenia
  • Thrombocytopathy asplenia miosis
  • Thrombocytopathy
  • Thrombocytopenia cerebellar hypoplasia short stature
  • Thrombocytopenia chromosome breakage
  • Thrombocytopenia multiple congenital anomaly
  • Thrombocytopenia purpura
  • Thrombocytopenia Robin sequence
  • Thrombocytopenia
  • Thrombocytopenic purpura, autoimmune
  • Thrombocytosis
  • Thrombomodulin anomalies, familial
  • Thrombotic microangiopathy, familial
  • Thumb absence hypoplastic halluces
  • Thumb absent short stature immune deficiency
  • Thumb deformity, alopecia, pigmentation anomaly
  • Thumb deformity
  • Thumb stiff brachydactyly mental retardation
  • Thymic epithelial tumor
  • Thymic renal anal lung dysplasia
  • Thymoma
  • Thymus neoplasm
  • Thyrocerebrorenal syndrome
  • Thyroglossal tract cyst
  • Thyroid agenesis
  • Thyroid cancer
  • Thyroid carcinoma, follicular
  • Thyroid carcinoma, papillary (TPC)
  • Thyroid hormone plasma membrane transport defect
  • Thyroid, renal and digital anomalies
  • Tibia absent polydactyly arachnoid cyst
  • Tibiae bowed radial anomalies osteopenia fracture
  • Tibial aplasia ectrodactyly hydrocephalus
  • Tibial aplasia ectrodactyly
  • Tibial hemimelia cleft lip palate
  • Tick paralysis
  • Tick-borne encephalitis
  • Tièche-Jadassohn nevus
  • Tietz syndrome
  • Tinnitus
  • T-Lymphocytopenia
  • Todd's paralysis
  • Togaviridae disease
  • Tollner Horst Manzke syndrome
  • Tolosa-Hunt syndrome
  • Toluene antenatal infection
  • Tomaculous neuropathy
  • Tome Brune Fardeau syndrome
  • Tongue neoplasm
  • Toni Debre Fanconi maladie
  • Toni-Fanconi syndrome
  • Topophobia
  • TORCH syndrome
  • Toriello Carey syndrome
  • Toriello Lacassie Droste syndrome
  • Toriello syndrome
  • Toriello-Higgins-Miller syndrome
  • Torres Ayber syndrome
  • Torsion dystonia 7
  • Torticollis keloids cryptorchidism renal dysplasia
  • Torulopsis
  • Tosti Misciali Barbareschi syndrome
  • Total Hypotrichosis, Mari type
  • Touraine-Solente-Golé syndrome
  • Tourette syndrome
  • Townes-Brocks syndrome
  • Toxic Conjunctivitis
  • Toxocariasis
  • Toxopachyoteose diaphysaire tibio peroniere
  • Toxoplasmosis congenital
  • Toxoplasmosis
  • Tracheal agenesis
  • Tracheobronchomalacia
  • Tracheobronchomegaly
  • Tracheobronchopathia osteoplastica
  • Tracheoesophageal fistula symphalangism
  • Tracheoesophageal fistula
  • Tracheophageal fistula hypospadias
  • Tranebjaerg Svejgaard syndrome
  • Transcobalamin II deficiency
  • Transient erythroblastopenia of childhood
  • Transient Global Amnesia
  • Transient neonatal arthrogryposis
  • Transitional cell carcinoma
  • Transplacental infections
  • Transposition of great vessels
  • Transverse limb deficiency hemangioma
  • Transverse myelitis
  • TRAPS (TNF-receptor-associated periodic syndrome)
  • Traumatophobia
  • Treft Sanborn Carey syndrome
  • Tremophobia
  • Tremor hereditary essential
  • Treponema infection
  • Trevor disease
  • Triatrial heart
  • Trichinellosis
  • Trichinosis
  • Tricho dento osseous syndrome type 1
  • Tricho odonto onycho dermal syndrome
  • Tricho odonto onychodysplasia syndactyly dominant type
  • Tricho onychic dysplasia
  • Tricho onycho hypohidrotic dysplasia
  • Tricho retino dento digital syndrome
  • Trichodental syndrome
  • Tricho-dento-osseous syndrome
  • Trichodermodysplasia dental alterations
  • Trichodysplasia xeroderma
  • Trichoepithelioma multiple familial
  • Trichofolliculloma
  • Tricho-hepato-enteric syndrome
  • Trichomalacia
  • Trichomegaly cataract hereditary spherocytosis
  • Trichomegaly retina pigmentary degeneration dwarfi
  • Trichoodontoonychial dysplasia
  • Trichopathophobia
  • Trichorhinophalangeal syndrome type I
  • Trichorhinophalangeal syndrome type II
  • Trichorhinophalangeal syndrome type III
  • Trichostasis spinulosa
  • Trichothiodystrophy sun sensitivity
  • Trichothiodystrophy
  • Trichotillomania
  • Tricuspid atresia
  • Tricuspid dysplasia
  • Trigeminal neuralgia
  • Trigger thumb
  • Trigonocephaly bifid nose acral anomalies
  • Trigonocephaly broad thumbs
  • Trigonocephaly ptosis coloboma
  • Trigonocephaly ptosis mental retardation
  • Trigonomacrocephaly tibial defect polydactyly
  • Trihydroxycholestanoylcoa oxidase isolated deficiency
  • Trimethadione antenatal infection
  • Trimethylaminuria
  • Triopia
  • Triose phosphate-isomerase deficiency
  • Triphalangeal thumb non opposable
  • Triphalangeal thumb polysyndactyly syndrome
  • Triphalangeal thumbs brachyectrodactyly
  • Triple A syndrome
  • Triplo X Syndrome
  • Triploid Syndrome
  • Triploidy
  • Trismus pseudocamptodactyly syndrome
  • Trisomy 1 mosaicism
  • Trisomy 11 mosaicism
  • Trisomy 12 mosaicism
  • Trisomy 14 mosaicism
  • Trisomy 2 mosaicism
  • Trisomy 3 mosaicism
  • Trisomy 6
  • Trisomy
  • Trochlear dysplasia
  • Trophoblastic Neoplasms (gestational trophoblastic disease)
  • Trophoblastic tumor
  • Tropical Spastic Paraparesis
  • Tropical sprue
  • Tropophobia
  • Troyer syndrome
  • Trueb Burg Bottani syndrome
  • Trypanophobia
  • Trypanosomiasis, east-African
  • Trypanosomiasis, west African
  • Tsao Ellingson syndrome
  • Tsukahara Azuno Kajii syndrome
  • Tsukahara Kajii syndrome
  • Tsukuhara syndrome
  • Tuberculophobia
  • Tuberculosis, pulmonary
  • Tuberculosis
  • Tuberculous meningitis
  • Tuberculous uveitis
  • Tuberous sclerosis, type 1
  • Tuberous sclerosis, type 2
  • Tuberous sclerosis
  • Tucker syndrome
  • Tuffli Laxova syndrome
  • Tufted angioma
  • Tularemia
  • Tungiasis
  • Tunglang Savage Bellman syndrome
  • Turcot syndrome
  • Turner Kieser syndrome
  • Turner Morgani Albright
  • Turner-like syndrome
  • Turner's syndrome
  • Tutuncuoglu syndrome
  • Twin twin transfusion syndrome
  • Typhoid
  • Typhus
  • Tyrosinemia
  • Tyrosine-oxidase temporary deficiency