This is a list of diseases starting with the letter "T".

T–Tc

  • Tachycardia
  • Taeniasis
  • Takayasu arteritis
  • Talipes equinovarus
  • Tamari–Goodman syndrome
  • Tang Hsi Ryu syndrome
  • Tangier disease
  • TAR syndrome
  • Tardive dyskinesia
  • Tarsal tunnel syndrome
  • Taste disorder
  • Tatton-Brown–Rahman syndrome
  • TAU syndrome
  • Taurodontia absent teeth sparse hair
  • Taurodontism
  • Tay syndrome ichthyosis
  • Taybi–Linder syndrome
  • Taybi syndrome
  • Tay–Sachs disease
  • T-cell lymphoma

Te

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Tee–Ten

  • 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–Tet

  • Ter Haar–Hamel–Hendricks syndrome
  • Ter Haar syndrome
  • Teratocarcinosarcoma
  • Teratoma
  • Testes neoplasm
  • Testotoxicosis
  • Tetanus
  • Tethered spinal cord disease
  • Tetraamelia ectodermal dysplasia
  • Tetraamelia multiple malformations
  • Tetraamelia pulmonary hypoplasia
  • Tetraamelia-syrinx
  • Tetrahydrobiopterin deficiency
  • Tetraploidy
  • Tetrasomy 9p
  • Tetrasomy 15qter syndrome
  • Tetrasomy X

Th

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Tha–Thi

  • Thakker–Donnai syndrome
  • Thalamic degeneration symmetrical infantile
  • Thalamic degenerescence infantile
  • Thalamic syndrome
  • Thalassemia major
  • Thalassemia minor
  • Thalassemia
  • 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

Tho

  • 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

Thr–Thu

  • 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
  • Thrush
  • Thumb absence hypoplastic halluces
  • Thumb absent short stature immune deficiency
  • Thumb deformity, alopecia, pigmentation anomaly
  • Thumb deformity
  • Thumb stiff brachydactyly mental retardation

Thy

  • Thymic carcinoma
  • 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

Ti–Tn

  • 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
  • TNF receptor associated periodic syndrome (TRAPS)

To

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Tod–Tot

  • Todd's paralysis
  • Todd's syndrome
  • 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
  • TORCH syndrome
  • Toriello–Carey syndrome
  • Toriello–Lacassie–Droste syndrome
  • Toriello syndrome
  • Toriello–Higgins–Miller syndrome
  • Torres–Ayber syndrome
  • Torsades de pointes
  • Torsion dystonia 7
  • Torticollis
  • Torticollis keloids cryptorchidism renal dysplasia
  • Torulopsis
  • Tosti–Misciali–Barbareschi syndrome
  • Total hypotrichosis, Mari type

Tou–Tox

  • Touraine–Solente–Golé syndrome
  • Tourette syndrome
  • Townes–Brocks syndrome
  • Toxic conjunctivitis
  • Toxic shock syndrome
  • Toxocariasis
  • Toxopachyoteose diaphysaire tibio peroniere
  • Toxoplasmosis

:* Toxoplasmosis, congenital

Tr

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Tra

  • Tracheal agenesis
  • Tracheobronchomalacia
  • Tracheobronchomegaly
  • Tracheobronchopathia osteoplastica
  • Tracheoesophageal fistula symphalangism
  • Tracheoesophageal fistula
  • Tracheophageal fistula hypospadias
  • Trachoma
  • 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

Tre

  • Treacher Collins syndrome
  • Treft–Sanborn–Carey syndrome
  • Tremor hereditary essential
  • Treponema infection
  • Trevor disease

Tri

  • Trisomy 13

Tria

  • Triatrial heart

Tric

  • 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-dwarfism syndrome
  • Trichomoniasis
  • Trichoodontoonychial dysplasia
  • Trichorhinophalangeal syndrome type I
  • Trichorhinophalangeal syndrome type II
  • Trichorhinophalangeal syndrome type III
  • Trichostasis spinulosa
  • Trichothiodystrophy sun sensitivity
  • Trichothiodystrophy
  • Trichotillomania
  • Tricuspid atresia
  • Tricuspid dysplasia
  • Tricyclic antidepressant overdose

Trig–Trip

  • Trigeminal neuralgia
  • Trigger finger
  • Trigonocephaly
  • 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
  • Triosephosphate isomerase deficiency
  • Triphalangeal thumb non opposable
  • Triphalangeal thumb polysyndactyly syndrome
  • Triphalangeal thumbs brachyectrodactyly
  • Triple A syndrome
  • Triplo X Syndrome
  • Triploid Syndrome
  • Triploidy

Tris

  • Trismus pseudocamptodactyly syndrome
  • Trisomy 1 mosaicism
  • Trisomy 11 mosaicism
  • Trisomy 12 mosaicism
  • Trisomy 14 mosaicism
  • Trisomy 2 mosaicism
  • Trisomy 3 mosaicism
  • Trisomy 6
  • Trisomy

Tro–Try

  • Trochlear dysplasia
  • Trophoblastic Neoplasms (gestational trophoblastic disease)
  • Trophoblastic tumor
  • Tropical spastic paraparesis
  • Tropical sprue
  • Troyer syndrome
  • Trueb–Burg–Bottani syndrome
  • Trypanophobia
  • Trypanosomiasis, East African
  • Trypanosomiasis, West African

Ts

  • Tsao–Ellingson syndrome
  • Tsukahara–Azuno–Kajii syndrome
  • Tsukahara–Kajii syndrome
  • Tsukuhara syndrome

Tu–Tw

  • Tuberculosis, pulmonary
  • Tuberculosis
  • Tuberculosis Short-Term
  • Tuberculous meningitis
  • Tuberculous uveitis
  • Tuberous Sclerosis

:* Tuberous Sclerosis, type 1

:* Tuberous Sclerosis, type 2

  • 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-to-twin transfusion syndrome

Ty–Tz

  • Typhoid
  • Typhus
  • Tyrosinemia
  • Tyrosine-oxidase temporary deficiency