- Tay-Sachs Disease
- Telangiectasia, Hereditary Hemorrhagi
- Telangiectasis
- Temporomandibular Joint Dysfuntion Syndrome
- Temporomandibular Joint Disorders
- Tennis Elbow
- Tenosynovitis
- Testicular Diseases
- Tetanus
- Tetralogy of Fallot
- Thalassemia
- Thoracic Neoplasms
- Thoracic Outlet Syndrome
- Thromboangiitis Obliterans
- Thrombocytopenia
- Thrombosis
- Thyroid Diseases
- Thyroid Nodule
- Trichotillomania
- Tricuspid Atresia
- Trigeminal Neuralgia
- Triosephosphate Isomerase Deficiency
- Trisomy 13
- Trophoblastic Neoplasms
- Trypanosomiasis, African
- Trypanosomiasis
- Tuberculosis
- Tuberous Sclerosis
- Tularemia
- Turner’s Syndrome
- Twins, Conjoined
- Tympanic Membrane Perforation
- Typhoid
- Typhus, Epidemic Louse-Borne
- Tyrosinemia