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- T+ B+ severe combined immunodeficiency
- T-ALL
- T-B+ SCID
- T-B+ SCID due to CD3delta/CD3epsilon/CD3zeta
- T-B+ SCID due to CD45 deficiency
- T-B+ SCID due to gamma chain deficiency
- T-B+ SCID due to IL-7Ralpha deficiency
- T-B+ SCID due to JAK3 deficiency
- T-B+ severe combined immunodeficiency
- T-B+ severe combined immunodeficiency due to CD3delta/CD3epsilon/CD3zeta
- T-B+ severe combined immunodeficiency due to CD45 deficiency
- T-B+ severe combined immunodeficiency due to gamma chain deficiency
- T-B+ severe combined immunodeficiency due to IL-7Ralpha deficiency
- T-B+ severe combined immunodeficiency due to JAK3 deficiency
- T-B+ severe combined immunodeficiency, X-linked
- T-B- SCID
- T-B- severe combined immunodeficiency
- T-cell chronic lymphocytic leukemia
- T-cell immunodeficiency due to RHOH deficiency
- T-cell immunodeficiency with epidermodysplasia verruciformis
- T-cell immunodeficiency with thymic aplasia
- T-cell large granular lymphocyte leukemia
- T-cell LGL leukemia
- T-cell lymphoma, AILD type
- T-cell NHL
- T-cell non-Hodgkin lymphoma
- T-cell prolymphocytic leukemia
- T-cell/histiocyte rich large B cell lymphoma
- T-LGL
- T-PLL
- T2 deficiency
- TAB2-related syndrome
- Tabatznik syndrome
- TACH syndrome
- TAFRO syndrome
- Takao syndrome
- Takatsuki syndrome
- Takayasu arteritis
- Takenouchi-Kosaki syndrome
- Tako-Tsubo cardiomyopathy
- Tako-Tsubo syndrome
- Takotsubo cardiomyopathy
- Takotsubo syndrome
- Talaromyces marneffei infection
- Talaromycosis
- TALDO deficiency
- Talipes equinovarus-atrial septal defect-Robin sequence-persistence of the left superior vena cava syndrome
- Tall forehead-sparse hair-skin hyperextensibility-scoliosis syndrome
- Tall stature-intellectual disability-renal anomalies syndrome
- Tall stature-long halluces-multiple extra-epiphyses syndrome
- Tall stature-scoliosis-macrodactyly of the halluces syndrome
- Talo-patello-scaphoid osteolysis
- Tangier disease
- TANGO2-related metabolic encephalopathy-arrhythmia syndrome
- Tapetochoroidal dystrophy
- Tappeiner-Pfleger disease
- TAPS
- TAR syndrome
- Targetoid hemosiderotic hemangioma
- TARP syndrome
- Tarsal kink syndrome
- Tarsal-carpal coalition syndrome
- Tarui disease
- Tatton-Brown-Rahman overgrowth syndrome
- Tatton-Brown-Rahman syndrome
- Tattoo dysplasia
- Taussig-Bing syndrome
- Tay-Sachs disease
- Tay-Sachs disease, adult form
- Tay-Sachs disease, infantile form
- Tay-Sachs disease, juvenile form
- Taybi syndrome
- Taybi-Linder syndrome
- TBCD
- TBCK-related intellectual disability syndrome
- TBE
- TBS
- TCA cycle disorder
- TCF12-related syndromic craniosynostosis
- TCI deficiency
- TCP
- TCR-alpha-beta+ T-cell deficiency
- TCR-alpha-beta-positive T-cell deficiency
- TD
- TD1
- TD2
- TDO syndrome
- Teebi hypertelorism syndrome
- Teebi-Al Saleh-Hassoon syndrome
- Teebi-Kaurah syndrome
- Teebi-Naguib-Alawadi syndrome
- Teebi-Shaltout syndrome
- Tel Hashomer camptodactyly syndrome
- Telangiectasia macularis eruptiva perstans
- Telangiectasia-erythrocytosis-monoclonal gammopathy-perinephric-fluid collections-intrapulmonary shunting syndrome
- Telecanthus-hypertelorism-strabismus-pes cavus syndrome
- Telethonin-related LGMD R7
- Telethonin-related limb-girdle muscular dystrophy R7
- Telfer-Sugar-Jaeger syndrome
- TELO2-related intellectual disability-neurodevelopmental disorder
- Telomeric 15q deletion syndrome
- Telomeric deletion 10p
- Telomeric deletion 10q
- Telomeric deletion 11q
- Telomeric deletion 12q
- Telomeric deletion 13q
- Telomeric deletion 14q
- Telomeric deletion 17p
- Telomeric deletion 17q
- Telomeric deletion 19p
- Telomeric deletion 1q
- Telomeric deletion 4p
- Telomeric deletion 4q
- Telomeric deletion 5q
- Telomeric deletion 7p
- Telomeric deletion 7q36
- Telomeric deletion 9p
- Telomeric duplication 10q
- Telomeric duplication 11q
- Telomeric duplication 13q
- Telomeric duplication 14q
- Telomeric duplication 15q
- Telomeric duplication 16p
- Telomeric duplication 16q
- Telomeric duplication 17q
- Telomeric duplication 18q
- Telomeric duplication 19q
- Telomeric duplication 1p36
- Telomeric duplication 20q
- Telomeric duplication 22q
- Telomeric duplication 2p
- Telomeric duplication 2q
- Telomeric duplication 3p
- Telomeric duplication 4p
- Telomeric duplication 4q
- Telomeric duplication 5q
- Telomeric duplication 6p
- Telomeric duplication 6q
- Telomeric duplication 7p
- Telomeric duplication 8q
- Telomeric duplication 9q
- Telomeric monosomy 3p
- TEMF
- Temperature-sensitive oculocutaneous albinism type 1
- TEMPI syndrome
- Temple syndrome
- Temple syndrome due to maternal uniparental disomy of chromosome 14
- Temple syndrome due to paternal 14q32.2 hypomethylation
- Temple syndrome due to paternal 14q32.2 microdeletion
- Temple-Baraitser syndrome
- Temporal arteritis
- Temporomandibular joint anomaly
- Temtamy preaxial brachydactyly syndrome
- Temtamy syndrome
- Temtamy-Shalash syndrome
- TEN
- Tenosynovial giant cell tumor
- Ter Haar syndrome
- Teratogenic Pierre Robin sequence
- Teratogenic Pierre Robin syndrome
- Teratoma of the central nervous system
- Teratoma of the nasopharynx
- Teratoma of the testis
- Terminal complement pathway deficiency
- Terminal extramedullary conus spinal cord lipoma
- Terminal myelocystocele
- Terminal osseous dysplasia-pigmentary defects syndrome
- Terrien marginal degeneration
- Tessier cleft number 1,2
- Tessier number 0-14 and 30 facial cleft
- Tessier number 1 cleft
- Tessier number 1-1 and 2-12 facial cleft
- Tessier number 4 facial cleft
- Tessier number 5 facial cleft
- Tessier number 6 facial cleft
- Tessier number 7 facial cleft
- Testicular agenesis
- Testicular and paratesticular tumor
- Testicular feminization syndrome
- Testicular germ cell tumor
- Testicular non seminomatous germ cell tumor
- Testicular non-dysgerminomatous germ cell tumor
- Testicular regression syndrome
- Testicular seminoma
- Testicular seminomatous germ cell tumor
- Testicular sex cord-stromal tumor
- Testicular teratoma
- Testotoxicosis
- TET3 deficiency
- TET3-related Beck-Fahrner syndrome
- Tetanus
- Tetra X
- Tetraamelia-multiple malformations syndrome
- Tetragametic chimerism syndrome
- Tetrahydrobiopterin-responsive HPA/PKU
- Tetrahydrobiopterin-responsive hyperphenylalaninemia/phenylketonuria
- Tetralogy of Fallot
- Tetramelic monodactyly
- Tetraploidy syndrome
- Tetrasomy 11q24.1
- Tetrasomy 15(q25-qter)
- Tetrasomy 15q26
- Tetrasomy 16p12.1p12.3
- Tetrasomy 18p syndrome
- Tetrasomy 21 syndrome
- Tetrasomy 5p syndrome
- Tetrasomy 9p syndrome
- Tetrasomy X syndrome
- Teunissen-Cremers syndrome
- TFP deficiency
- TFPD
- TFR2-related hemochromatosis
- TFRC-related combined immunodeficiency
- TGA
- TGA with cardiac malformation
- TGA with coarctation
- TGCT
- TGCV
- TGV
- TH-SHFM
- Thakker-Donnai syndrome
- Thalidomide embryopathy
- Thanatophoric dwarfism type 1
- Thanatophoric dwarfism type 2
- Thanatophoric dwarfism-cloverleaf skull syndrome
- Thanatophoric dysplasia
- Thanatophoric dysplasia type 1
- Thanatophoric dysplasia type 2
- Thauvin-Robinet-Faivre syndrome
- THBD-related bleeding disorder
- THBD-related coagulopathy
- Theca (steroid-producing) cell cancer, not further specified
- Theca steroid-producing cell malignant tumor of ovary, not further specified
- Theodore superior limbic keratoconjunctivitis
- Theodore syndrome
- Therapy related acute myeloid leukemia and myelodysplastic syndrome
- Therapy-related AML and myelodysplastic syndrome
- THH
- Thiamine-responsive BCKD deficiency
- Thiamine-responsive branched-chain alpha-ketoacid dehydrogenase deficiency
- Thiamine-responsive encephalopathy
- Thiamine-responsive maple syrup urine disease
- Thiamine-responsive megaloblastic anemia syndrome
- Thiamine-responsive megaloblastic anemia with diabetes mellitus and sensorineural deafness
- Thiamine-responsive megaloblastic anemia with diabetes mellitus and sensorineural hearing loss
- Thiamine-responsive MSUD
- Thickened earlobes-conductive deafness syndrome
- Thickened earlobes-conductive hearing loss syndrome
- Thiel-Behnke corneal dystrophy
- Thiemann disease, familial form
- Thies-Reis syndrome
- Thin ribs-tubular bones-dysmorphism syndrome
- Thinking seizures
- Third branchial cleft anomaly
- Third branchial cleft cyst
- Third branchial cleft fistula
- THOC6-related developmental delay-microcephaly-facial dysmorphism syndrome
- Thomas syndrome
- Thomas-Jewett-Raines syndrome
- Thompson-Baraitser syndrome
- Thomsen and Becker disease
- Thong-Douglas-Ferrante syndrome
- Thoracic dysplasia-hydrocephalus syndrome
- Thoracic malformation
- Thoracic outlet compression syndrome
- Thoracic outlet syndrome
- Thoraco-abdominal enteric duplication
- Thoraco-abdominal syndrome
- Thoracolaryngopelvic dysplasia
- Thoracolimb dysplasia, Rivera type
- Thoracomelic dysplasia
- THRLBCL
- Thromboangiitis obliterans
- Thrombocythemia with distal limb defects
- Thrombocytopathy-asplenia-miosis syndrome
- Thrombocytopenia with congenital dyserythropoietic anemia
- Thrombocytopenia-absent radius syndrome
- Thrombocytopenia-anasarca-fever-renal insufficiency-organomegaly syndrome
- Thrombomodulin-related bleeding disorder
- Thrombomodulin-related coagulopathy
- Thrombotic microangiopathy
- Thrombotic thrombocytopenic purpura
- Thrombotic thrombocytopenic purpura due to anti-ADAMTS-13 antibodies
- Thumb deformity-alopecia-pigmentation anomaly syndrome
- Thumb stiffness-brachydactyly-intellectual disability syndrome
- Thurston syndrome
- Thygeson superficial punctate keratitis
- Thygeson superficial punctate keratopathy
- Thymic carcinoma
- Thymic epithelial neoplasm
- Thymic epithelial tumor
- Thymic neuroendocrine carcinoma
- Thymic neuroendocrine tumor
- Thymic tumor
- Thymic-renal-anal-lung dysplasia
- Thymoma
- Thymoma type A
- Thymoma type AB
- Thymoma type B
- Thymoma-immunodeficiency syndrome
- Thyrocerebrorenal syndrome
- Thyroid dyshormonogenesis
- Thyroid ectopia
- Thyroid hemiagenesis
- Thyroid hypoplasia
- Thyroid lymphoma
- Thyroid stimulating hormone-secreting pituitary adenoma
- Thyroid-renal-digital anomalies
- Thyrotoxic hypokalemic periodic paralysis
- Thyrotoxic periodic paralysis
- Thyrotroph adenoma
- Tibia vara Blount
- Tibial aplasia-ectrodactyly syndrome
- Tibial hemimelia with split hand/foot malformation
- Tibial hemimelia-ectrodactyly syndrome
- Tibial hemimelia-polysyndactyly-triphalangeal thumb syndrome
- Tibial muscular dystrophy
- Tick-borne encephalitis
- Tietz syndrome
- Timothy syndrome
- Timothy syndrome type 1
- Timothy syndrome type 2
- TINU syndrome
- TIO
- Titin-related LGMD R10
- Titin-related limb-girdle muscular dystrophy R10
- TJP2 deficit
- TKT deficiency
- TLR8-related inflammation-severe neutropenia-bone marrow failure-lymphoproliferation syndrome
- TM
- TMA
- TMAU
- TMBTS
- TMD
- TMD
- TMEM147-related neurodevelopmental disorder
- TMEM165-CDG
- TMEM199-CDG
- TMEM70-related mitochondrial encephalo-cardio-myopathy
- TMEM94-associated congenital heart defect-facial dysmorphism-developmental delay syndrome
- TNDM
- TNF receptor 1-associated periodic syndrome
- TNP03-related limb-girdle muscular dystrophy D2
- Toll-like receptor 8-associated inflammation-severe neutropenia-bone marrow failure-lymphoproliferation syndrome
- Tolosa-Hunt syndrome
- Toluene embryopathy
- Tomaculous neuropathy
- Tonic pupil-tendon areflexia syndrome
- Tonoki-Ohura-Niikawa syndrome
- Tooth and nail syndrome
- TOR1AIP1-related LGMD
- TOR1AIP1-related limb-girdle muscular dystrophy
- Torg-Winchester syndrome
- Toriello Lacassie Droste syndrome
- Toriello syndrome
- Toriello-Carey syndrome
- Toriello-Higgins-Miller syndrome
- Torpedo Maculopathy
- Torsade-de-pointes syndrome with short coupling interval
- Torticollis-keloids-cryptorchidism-renal dysplasia syndrome
- Tortuosity of retinal arteries
- TOS
- Total autosomal monosomy syndrome
- Total autosomal trisomy syndrome
- Total color blindness
- Total early-onset cataract
- Total septate uterus
- Total uveitis
- Touraine-Solente-Gole syndrome
- Townes syndrome
- Townes-Brocks syndrome
- Toxic dermatosis
- Toxic epidermal necrolysis
- Toxic maculopathy due to antimalarial drugs
- Toxic oil syndrome
- Toxic or drug-related embryofetopathy
- Toxic pustuloderma
- Toxin-mediated infectious botulism
- Toxin-mediated infective botulism
- Toxocariasis
- Toxopachyosteose diaphysaire tibio-peroniere
- Toxoplasma embryofetopathy
- Toxoplasma embryopathy
- TPFS
- TPHA
- TPPII-related immunodeficiency, autoimmunity, and neurodevelopmental delay with impaired glycolysis and lysosomal expansion disease
- Traboulsi syndrome
- Tracheal agenesis
- Tracheal anomaly
- Tracheal atresia
- Tracheobronchomegaly
- Tracheobronchopathia osteochondroplastica
- Tracheopathia osteoplastica
- TRAF7-associated heart defect-digital anomalies-facial dysmorphism-motor and speech delay syndrome
- Tranebjaerg-Svejgaard syndrome
- Transaldolase deficiency
- Transcobalamin deficiency
- Transcobalamin I deficiency
- Transcobalamin II deficiency
- Transcobalamin-1 deficiency
- Transcortin deficiency
- Transgrediens et progrediens palmoplantar keratoderma
- Transgrediens et progrediens PPK
- Transient abnormal myelopoiesis
- Transient acquired pure red cell aplasia
- Transient antenatal Bartter syndrome
- Transient bullous dermolysis of the newborn
- Transient congenital hypothyroidism
- Transient congenital hypothyroidism due to maternal factor
- Transient congenital hypothyroidism due to neonatal factor
- Transient erythroblastopenia of childhood
- Transient familial neonatal hyperbilirubinemia
- Transient hyperammonemia of the newborn
- Transient hypogammaglobulinemia of infancy
- Transient infantile hypertriglyceridemia and fatty liver
- Transient infantile hypertriglyceridemia and hepatosteatosis
- Transient left ventricular apical ballooning syndrome
- Transient myeloproliferative disease
- Transient myeloproliferative syndrome
- Transient neonatal acquired myasthenia
- Transient neonatal autoimmune myasthenia gravis
- Transient neonatal cyanosis and anemia due to Toms River Hemoglobin
- Transient neonatal diabetes mellitus
- Transient neonatal glutaric acidemia type 2
- Transient neonatal glutaric aciduria type 2
- Transient neonatal MAD deficiency
- Transient neonatal MADD
- Transient neonatal multiple acyl-CoA dehydrogenase deficiency
- Transient neonatal myasthenia gravis
- Transient predisposition to invasive pyogenic bacterial infection
- Transient pseudohypoaldosteronism
- Transient reactive papulotranslucent acrokeratoderma
- Transient tyrosinemia of the neonate
- Transient tyrosinemia of the newborn
- Transitional atrioventricular canal defect
- Transitional cell carcinoma of the corpus uteri
- Transitional cell carcinoma of the pelvis and ureter
- Transitional cell carcinoma of the upper urinary tract
- Transitional extramedullary conus spinal cord lipoma
- Transitional PMD
- Transketolase deficiency
- Translocation renal cell carcinoma
- Transmissible spongiform encephalopathy
- Transplacentally acquired neonatal autoimmune disease
- Transplant-related bronchiolitis obliterans
- Transposition of the great arteries
- Transposition of the great arteries and conotruncal cardiac anomaly
- Transposition of the great vessels
- Transverse facial cleft
- Transverse vaginal septum
- TRAP
- TRAPPC11-related LGMD R18
- TRAPPC11-related limb-girdle muscular dystrophy R18
- TRAPS syndrome
- Traumatic avascular necrosis
- Traumatic AVN
- Traumatic myiasis
- Treacher-Collins syndrome
- Trehalase deficiency
- Tremor-ataxia-central hypomyelination syndrome
- Tremor-nystagmus-duodenal ulcer syndrome
- Trench fever
- Trevor disease
- TRH resistance syndrome
- Triad syndrome
- TRIANGLE disease
- Triangular tibia-fibular aplasia syndrome
- Triatrial heart
- Tricarboxylic acid cycle disorder
- Trichinellosis
- Trichinosis
- Tricho-dento-osseous syndrome
- Tricho-hepato-enteric syndrome
- Tricho-retino-dento-digital syndrome
- Trichodental syndrome
- Trichodermodysplasia-dental alterations syndrome
- Trichodysplasia spinulosa
- Trichodysplasia-abnormal dermatoglyphics-intellectual disability syndrome
- Trichodysplasia-amelogenesis imperfecta syndrome
- Trichodysplasia-xeroderma syndrome
- Trichofolliculoma
- Trichohepatoenteric syndrome
- Trichomatrical carcinoma
- Trichomegaly-retina pigmentary degeneration-dwarfism syndrome
- Trichoodontoonychial dysplasia
- Trichoodontoonychial dysplasia with bone deficiency in frontoparietal region
- Trichorhinophalangeal syndrome
- Trichorhinophalangeal syndrome type 1
- Trichorhinophalangeal syndrome type 2
- Trichothiodystrophy
- Tricuspid atresia
- Tricuspid valve agenesis
- Trigeminal autonomic cephalalgia
- Trigeminal neuralgia
- Trigeminal neuropathy with nasal ulceration
- Trigeminal neurotrophic ulceration
- Trigeminal trophic syndrome
- Triglyceride deposit cardiomyovasculopathy
- Trigonocephaly C syndrome
- Trigonocephaly-bifid nose-acral anomalies syndrome
- Trigonocephaly-broad thumbs syndrome
- Trigonocephaly-short stature-developmental delay syndrome
- Trilineage bone marrow failure-developmental delay syndrome
- TRIM22-related IBD
- TRIM22-related inflammatory bowel disease
- TRIM32-related LGMD R8
- TRIM32-related limb-girdle muscular dystrophy R8
- Triophthalmia
- Triopia
- Triose phosphate-isomerase deficiency
- Trip(16)(p12.1p12.3)
- Triphalangeal thumbs-brachyectrodactyly syndrome
- Triple A syndrome
- Triple H syndrome
- Triplication 15q25-qter
- Triplication 15q26
- Triplo-X syndrome
- Triploidy syndrome
- Trismus-pseudocamptodactyly syndrome
- Trisomy 1 mosaicism
- Trisomy 10 mosaicism
- Trisomy 10p syndrome
- Trisomy 10q22.3q23.3
- Trisomy 10qter
- Trisomy 11p15.4
- Trisomy 11qter
- Trisomy 12 mosaicism
- Trisomy 12p syndrome
- Trisomy 13 syndrome
- Trisomy 13qter
- Trisomy 14 mosaicism
- Trisomy 14q11.2
- Trisomy 14q32
- Trisomy 14qter
- Trisomy 15 mosaicism
- Trisomy 15q11q13
- Trisomy 15qter
- Trisomy 16 mosaicism
- Trisomy 16p11.2p12.2
- Trisomy 16p13.11
- Trisomy 16pter
- Trisomy 16qter
- Trisomy 17 mosaicism
- Trisomy 17p syndrome
- Trisomy 17p11.2
- Trisomy 17p11.2-p12
- Trisomy 17p11.2p12
- Trisomy 17p13.3
- Trisomy 17q11.2
- Trisomy 17q12
- Trisomy 17q21.31
- Trisomy 17qter
- Trisomy 18 syndrome
- Trisomy 18p syndrome
- Trisomy 18qter
- Trisomy 19qter
- Trisomy 1pter
- Trisomy 1q syndrome
- Trisomy 1q21.1
- Trisomy 2 mosaicism
- Trisomy 20 mosaicism
- Trisomy 20p syndrome
- Trisomy 20qter
- Trisomy 21
- Trisomy 22 mosaicism
- Trisomy 22q11.2
- Trisomy 22qter
- Trisomy 2pter
- Trisomy 2q23.1
- Trisomy 2qter
- Trisomy 3 mosaicism
- Trisomy 3pter
- Trisomy 3q26
- Trisomy 3q29
- Trisomy 4 mosaicism
- Trisomy 4p syndrome
- Trisomy 4pter
- Trisomy 4qter
- Trisomy 5 mosaicism
- Trisomy 5p syndrome
- Trisomy 5p13
- Trisomy 5q35
- Trisomy 5qter
- Trisomy 6pter
- Trisomy 6qter
- Trisomy 7 mosaicism
- Trisomy 7p22.1
- Trisomy 7pter
- Trisomy 7q11.23
- Trisomy 8 mosaicism
- Trisomy 8p syndrome
- Trisomy 8p23.1
- Trisomy 8q syndrome
- Trisomy 8q12
- Trisomy 8qter
- Trisomy 9 mosaicism
- Trisomy 9p syndrome
- Trisomy 9qter
- Trisomy of the short arm of chromosome 18
- Trisomy of the short arm of chromosome 4
- Trisomy of the short arm of chromosome 5
- Trisomy of the short arm of chromosome 9
- Trisomy X syndrome
- Trisomy Xp11.22p11.23
- Trisomy Xq27.3-q28
- Trisomy Xq27.3q28
- Tritan colour blindness
- Tritanopia
- TRMA
- tRNA-LYS-related cardiomyopathy-hearing loss syndrome
- Trophic ulceration of the ala nasi
- Tropical calcific chronic pancreatitis
- Tropical endomyocardial fibrosis
- Tropical pancreatitis
- Tropical pyomyositis
- Tropical spastic paraparesis
- Troyer syndrome
- TRPV4-related bone disorder
- TRS
- True congenital pancreatic cyst
- True congenital shoulder dislocation
- True microcephaly
- True MMC
- True myelomeningocele
- True myeloschisis
- True unicornuate uterus
- Truncus arteriosus
- TS
- TS OCA type 1
- TS1
- TS2
- Tsao-Ellingson syndrome
- TSC2/PKD1 contiguous gene syndrome
- TSE
- TSGCT
- TSH-oma
- TSH-secreting pituitary adenoma
- TSP
- Tsukahara syndrome
- Tsukahara-Kajii syndrome
- Tsutsugamushi disease
- Tsutsugamushi fever
- TTP
- TTS
- Tubal cancer
- Tuberculosis
- Tuberculosis of respiratory system
- Tuberous sclerosis
- Tuberous sclerosis complex
- Tuberous sclerosis/polycystic kidney disease contiguous gene syndrome
- Tubular aggregate myopathy
- Tubulinopathy-associated dysgyria
- Tubulocystic renal cell carcinoma
- Tubulointerstitial nephritis and uveitis syndrome
- Tucker syndrome
- Tufted angioma
- Tularemia
- Tulip-bulb digger's palsy
- Tumor necrosis factor receptor 1 associated periodic syndrome
- Tumor of cranial and spinal nerves
- Tumor of endocrine glands
- Tumor of hematopoietic and lymphoid tissues
- Tumor of meninges
- Tumor of testis and paratestis
- Tumor susceptibility linked to germline BAP1 mutations
- Tumor-induced osteomalacia
- Tungiasis
- Tungland-Bellman syndrome
- Tunnel subaortic stenosis
- Turban tumor syndrome
- Turcot syndrome with polyposis
- Turkish variant late infantile
- Turner syndrome
- Turner syndrome due to structural X chromosome anomalies
- Turner-Kieser syndrome
- Turnpenny-Fry syndrome
- Twin anemia-polycythemia sequence
- Twin to twin transfusion syndrome
- Twin-reversed arterial perfusion sequence
- Twisted atrioventricular connections
- Twisted hair
- Tylosis-oesophageal carcinoma syndrome
- Type 1 condylar hyperplasia
- Type 1 interferonopathy
- Type 1 interferonopathy of childhood
- Type 1 syndactyly-microcephaly-intellectual disability syndrome
- Type 11 collagen-related bone disorder
- Type 2 collagen-related bone disorder
- Typhoid
- Typhoid fever
- Typhoidal salmonellosis
- Typhus-group rickettsiae disease
- Typhus-group rickettsiosis
- Typical hemolytic uremic syndrome
- Typical HUS
- Typical nemaline myopathy
- Typical urticaria pigmentosa
- Typus Edinburgensis
- Tyrosinase-negative oculocutaneous albinism
- Tyrosine hydroxylase deficiency
- Tyrosine hydroxylase-deficient dopa-responsive dystonia
- Tyrosinemia due to 4-hydroxyphenylpyruvate dioxygenase deficiency
- Tyrosinemia due to 4-hydroxyphenylpyruvic acid oxidase deficiency
- Tyrosinemia due to HPD deficiency
- Tyrosinemia due to TAT deficiency
- Tyrosinemia due to tyrosine aminotransferase deficiency
- Tyrosinemia type 1
- Tyrosinemia type 2
- Tyrosinemia type 3
- Tyrosinemia type I
- Tyrosinemia type II
- Tyrosinemia type III