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TB (tuberculosis, phthisis)
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TGA (transposition of the great arteries, transposition of the great vessels)
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TIA (transient ischemic attack, reversible ischemic neurologic disease (RIND), ministroke)
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TMJ (temporomandibular joint disorders, temporomandibular joint syndrome, Costen's syndrome)
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TORCH infections (temporomandibular joint disorders, temporomandibular joint syndrome, Costen's syndrome)
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TSS (toxic shock syndrome)
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Tay-Sachs disease (hexosaminidase A deficiency, GM2-gangliosidosis, type I)
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ToF (tetrology of Fallot, Fallot's syndrome)
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Tourette syndrome (Gilles de la Tourette syndrome, multiple tic syndrome)
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Turner syndrome (monosomy X, Ullrich-Turner syndrome, 45,X gonadal dysgenesis)
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tachycardia (rapid heartbeat, fast heartbeat)
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talipes calcaneal valgus (flat feet, pes planus, fallen arches, pes planovalgus, excessive pronation)
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tardive dyskinesia (flat feet, pes planus, fallen arches, pes planovalgus, excessive pronation)
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teenage depression (depression in adolescents)
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teenage pregnancy (adolescent pregnancy)
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teething (adolescent pregnancy)
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temporal lobe epilepsy (complex partial seizure, temporal lobe seizures, psychomotor epilepsy)
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temporal lobe seizures (complex partial seizure, temporal lobe epilepsy, psychomotor epilepsy)
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temporomandibular joint disorders (temporomandibular joint syndrome, TMJ, Costen's syndrome)
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temporomandibular joint syndrome (temporomandibular joint disorders, TMJ, Costen's syndrome)
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tendinitis (temporomandibular joint disorders, TMJ, Costen's syndrome)
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tennis elbow (lateral epicondylitis, elbow tendonitis or tendinosis)
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tension headache (stress headache)
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tentorial herniation (brain herniation)
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testicular cancer (germ cell cancer of the testicle, seminoma)
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testicular feminization (complete androgen insensitivity syndrome, male pseudohermaphroditism)
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testicular torsion (torsion of the testicle, torsion of the spermatic cord)
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tetanus (lockjaw)
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tetrology of Fallot (ToF, Fallot's syndrome)
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thalassemia (thalassemia major, thalassemia minor, Cooley's anemia, Mediterranean anemia)
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thalassemia major (thalassemia, thalassemia minor, Cooley's anemia, Mediterranean anemia)
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thalassemia minor (thalassemia, thalassemia major, Cooley's anemia, Mediterranean anemia)
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the bends (decompression sickness, decompression illness, caisson disease)
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third-degree heart block (heart block, atrioventricular block, AV block, bundle branch block, complete heart block, first-degree heart block, second-degree heart block, cardiac conduction defect, infranodal block, intraatrial block, intraventricular block, sinoatrial block)
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thoracic aortic aneurysm (heart block, atrioventricular block, AV block, bundle branch block, complete heart block, first-degree heart block, second-degree heart block, cardiac conduction defect, infranodal block, intraatrial block, intraventricular block, sinoatrial block)
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thoracic outlet syndrome (true neurogenic thoracic outlet syndrome, disputed thoracic outlet syndrome, arterial thoracic outlet syndrome)
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three-day measles (rubella, German measles)
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thromboembolic state (thromboembolism)
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thromboembolism (thromboembolic state)
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thyroid cancer (thromboembolic state)
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thyromegaly (goiter)
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tibial tendinitis (shin splints)
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tic douloureux (trigeminal neuralgia)
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time zone change syndrome (jet lag)
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tinea pedis (athlete's foot, dermatophytosis)
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tinea versicolor (pityriasis versicolor)
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tinnitus (ringing in the ears)
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toenail conditions (ingrown toenail, abnormal nails, black toe, runner's toe, toenail infection)
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toenail infection (toenail conditions, ingrown toenail, abnormal nails, black toe, runner's toe)
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tonsillar abscess (peritonsillar abscess, quinsy, quinsy abscess)
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tonsillitis (acute tonsillitis, subacute tonsillitis, chronic tonsillitis)
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tooth abscess (abscessed tooth, infected tooth, dental abscess, periapical abscess)
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tooth decay (dental caries, cavities, dental decay)
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torsion of the spermatic cord (testicular torsion, torsion of the testicle)
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torsion of the testicle (testicular torsion, torsion of the spermatic cord)
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torticollis (spasmodic torticollis, congenital torticollis, wry neck)
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toxemia (preeclampsia, pregnancy-induced hypertension (PIH))
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toxemia with seizures (eclampsia)
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toxic dilation of the colon (toxic megacolon)
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toxic megacolon (toxic dilation of the colon)
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toxic shock syndrome (TSS)
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toxic synovitis (synovitis - toxic, transient synovitis of the hip)
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toxoplasmosis (synovitis - toxic, transient synovitis of the hip)
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trachoma (synovitis - toxic, transient synovitis of the hip)
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transexualism (gender identity disorder)
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transient ischemic attack (TIA, reversible ischemic neurologic disease (RIND), ministroke)
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transient synovitis of the hip (toxic synovitis, synovitis - toxic)
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transient tic disorder (motor twitches, motor tics, vocal tics)
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transposition of the great arteries (transposition of the great vessels, TGA)
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transposition of the great vessels (transposition of the great arteries, TGA)
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traumatic heart disease (myocardial contusion)
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traveler's diarrhea (diarrhea)
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trench mouth (gingivitis and periodontitis, swollen gums, gum infection, gingivostomatitis, pyorrhea)
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trichinosis (gingivitis and periodontitis, swollen gums, gum infection, gingivostomatitis, pyorrhea)
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trichomoniasis (gingivitis and periodontitis, swollen gums, gum infection, gingivostomatitis, pyorrhea)
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tricuspid incompetence (tricuspid regurgitation, tricuspid insufficiency)
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tricuspid insufficiency (tricuspid regurgitation, tricuspid incompetence)
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tricuspid regurgitation (tricuspid insufficiency, tricuspid incompetence)
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trigeminal neuralgia (tic douloureux)
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trisomy 21 (Down syndrome)
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trophoblastic disease (molar pregnancy, hydatiform mole, gestational trophoblastic neoplasia)
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true neurogenic thoracic outlet syndrome (thoracic outlet syndrome, disputed thoracic outlet syndrome, arterial thoracic outlet syndrome)
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tubal pregnancy (ectopic pregnancy, pregnancy in the fallopian tube, extrauterine pregnancy)
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tuberculosis (TB, phthisis)
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tularemia (rabbit fever)
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tumor (cancer, carcinoma, malignancy)
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turning in of the eyelid (entropion, inversion of the eyelid)
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type 1 diabetes mellitus (insulin-dependent diabetes mellitus, IDDM)
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type 1 poliovirus (poliomyelitis, acute paralytic poliomyelitis or APP, polio, paralytic poliomyelitis, nonparalytic poliomyelitis, infantile paralysis)
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type 2 diabetes mellitus (noninsulin dependent diabetes mellitus, adult-onset diabetes mellitus, NIDDM)
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type IIa hyperlipoproteinemia (familial hypercholesterolemia)
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type IIb hyperlipoproteinemia (familial combined hyperlipidemia)
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type IV hyperlipoproteinemia (familial hypertriglyceridemia)

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