Diagnosaurus
- Tachycardia
- Tachycardia, sinus
- Telangiectasia
- Testicular mass or swelling
- Testicular pain
- Tetany
- Third-trimester vaginal bleeding
- Thrombocytopenia
- Thrombocytosis
- Thyroid enlargement (goiter)
- Thyroid nodules
- Thyroid-stimulating hormone, decreased
- Thyroid-stimulating hormone, increased
- Tinnitus
- Tongue, large
- Tongue, red & smooth (glossitis)
- Tongue pain or burning
- Tonsillitis
- Tooth pain
- Toxidromes
- Tracheal obstruction
- Traveler's diarrhea
- Traveler and fever
- Tremor
- Tricyclic antidepressant overdose
- Triglycerides increased
- TSH decreased
- TSH increased
- Tumor, bone
- Tumor, brain
- Tumor, breast
- Tumor, neck
- Tumor, ovarian
- Tumor, renal
- Tumor, salivary gland
- Tumor, testicular
- Tumors, cardiac
- Tumors, nasal
- T wave inversion of ST depression