Tabes dorsalis/Tabetic neurosyphilis
Tachycardia-bradycardia syndrome
Takayasu arteritis
Talalgia
Teacher's nodes
Tearing, increased
Temporomandibular joint (TMJ) syndrome
Teniasis
Tenosynovitis, radial styloid
Tension headache
Testicular cancer
Tetanus
Tetraplegia
Thalassemia
The Great Imitator
Thromboangiitis obliterans
Thrombocythemia
Thrombophlebitis, superficial
Thrombosis, deep vein (DVT)
Thrombosis, cerebral
Thrush, oral
Thyroid cancer
Thyroid nodules, benign
Thyroiditis
Thyrotoxicosis

Tietze's disease/Tietze's syndrome
Tinea
Tinea versicolor
Tinnitus
Tongue cancer
Tonsil cancer
Toothache
Toxemia pregnancy
Transient ischemic attack (TIA)
Transient synovitis of hip
Traumatic subdural hematoma
Trench mouth
Tri douloureux/Trifacial neuralgia
Trichiasis
Trichomonal vulvovaginitis
Trigeminal neuralgia
Trophic ulcer
Tubal pregnancy
Tuberculid
Tuberculosis
Tuberculosis of bone and joint
Tuberculosis of breast
Tuberculosis verrucosa cutis
Tylosis palmaris et plantaris