Human health and medicine

Thiothixene

Thiothixene (tiotixene, brand Navane) is a first-generation thioxanthene antipsychotic approved in the US in 1967 for schizophrenia; D2 antagonist, 20-30 mg/day typical dose, brand discontinued with generics remaining.

Oct 20, 2026

Third branchial cleft anomaly

Third branchial cleft anomaly (third branchial fistula, pyriform sinus tract): rare congenital neck malformation, 2–8% of branchial anomalies, left-sided, presenting as recurrent neck abscess or suppurative thyroiditis.

Third degree haemorrhoids

Third degree haemorrhoids (Goligher grade III) are internal haemorrhoids that prolapse and need manual reduction. Office banding helps selected cases; surgery is the standard indication, with excisional procedures most durable but most complications.

Third heart sound

Third heart sound (S3, ventricular gallop): low-frequency early-diastolic sound 120–180 ms after S2 from rapid filling deceleration; normal under ~40, otherwise marks heart failure, with 51% sensitivity and 90% specificity for reduced ejection fraction.

Third molar extraction

Third molar extraction is the surgical removal of wisdom teeth, usually impacted lower third molars, to treat or prevent pericoronitis, decay, cysts, or damage to adjacent teeth.

Third molar surgery

Third molar surgery is the operative removal of an impacted or erupted wisdom tooth, usually a lower one, to treat or prevent pain, infection, and other pathology.

Third plague pandemic

Third plague pandemic: the third of three Yersinia pestis pandemics, beginning in Yunnan, China, mid-19th century, reaching Hong Kong 1894; bacillus discovered by Yersin and Kitasato; killed over 12 million in India; ended circa 1952.

Third space endoscopy

Third space endoscopy is a minimally invasive endoscopic technique that opens the submucosal layer as a working tunnel to reach lesions, best known for POEM, its myotomy for achalasia.

Third-stage haemorrhage

Third-stage haemorrhage (ICD-11 JA43.0; ICD-10 O72.0) is excessive bleeding during the third stage of labour, between fetal and placental delivery, typically from uterine atony or retained placenta.

THOC6-related developmental delay-microcephaly-facial dysmorphism syndrome

THOC6-related developmental delay-microcephaly-facial dysmorphism syndrome, also called Beaulieu-Boycott-Innes syndrome or THOC6 intellectual disability syndrome, is a rare autosomal recessive disorder caused by biallelic THOC6 variants, causing moderate-to-severe intellectual disability, microcephaly, facial dysmorphism, and heart, renal, and dental anomalies.

Thomas Connelly (dentist)

Thomas Patrick Connelly, DDS, the "Father of Diamond Dentistry" per Rolling Stone, is a Detroit-born cosmetic dentist in Beverly Hills and NYC known for Post Malone's $1.6M diamond fangs, Lil Yachty's 16-carat teeth, Ye's $850K titanium grillz, and denied 2024 nitrous oxide allegations.

Thomas E. Bryant

Thomas E. Bryant is a public health practitioner-researcher whose 2019 study in DeLand, Florida, found providers knew Florida's prenatal HIV testing rule but often did not follow it.

Thomas E. Malone

Thomas E. Malone was an American biomedical research administrator who served as the sixth Deputy Director of the National Institutes of Health from 1977 to 1986.

Thomas Jefferson University Hospital

Thomas Jefferson University Hospital, flagship of Jefferson Health at 111 S 11th St, Philadelphia; 717-bed academic Level I trauma center, founded 1825, second U.S. teaching hospital (1877), U.S. News top-10 PA hospital.

Thomas P. Almy

Thomas P. Almy (died 2002) was an American gastroenterologist who chaired medicine at Dartmouth Medical School and was a former president of the American Gastroenterological Association.

Thomas R. Fleming

Thomas R. Fleming is an American biostatistician and Professor Emeritus at the University of Washington, co-developer of the O'Brien-Fleming method for early trial stopping and a National Academy of Medicine member.

Thomas syndrome

Thomas syndrome, also called Potter sequence-cleft lip/palate-cardiopathy syndrome (ORPHA:3316), is an extremely rare autosomal recessive congenital disorder with renal anomalies, cardiac malformations, and cleft lip or palate, described in six patients.

Thomas Szasz

Thomas Szasz (1920–2012), Hungarian-born American psychiatrist at SUNY Syracuse, author of The Myth of Mental Illness (1961), who argued mental illness is a metaphor for problems in living and opposed involuntary psychiatry, the insanity defense, and drug prohibition.

Thomas test

The Thomas test is a physical examination maneuver in which a thigh that fails to rest flat on the table while the opposite hip is flexed indicates a hip flexion contracture.

Thomas W. Langfitt

Thomas W. Langfitt (1927–2005) was an American neurosurgeon who chaired neurosurgery at the University of Pennsylvania from 1968 to 1987 and later served as president of the Pew Charitable Trusts.

Oct 20, 2026

Thomsen and Becker disease

Thomsen and Becker disease are the dominant and recessive forms of myotonia congenita, a CLCN1 chloride-channel disorder causing childhood muscle stiffness with warm-up; Becker is more common and severe.

Oct 20, 2026

Thonzonium

Thonzonium (thonzonium bromide, tonzonium bromide, CAS 553-08-2) is a cationic quaternary ammonium surfactant added to ear and nasal drops such as Cortisporin-TC to disperse debris and enhance drug penetration; also a V-ATPase inhibitor and studied coronavirus 3CL protease inhibitor.

Thoracentesis

Thoracentesis (thoracocentesis): needle aspiration of pleural fluid from a pleural effusion, diagnostic or therapeutic. Key facts: ultrasound-guided, above the rib, 1.5 L maximum per attempt, pneumothorax and re-expansion pulmonary oedema are complications.