Human health and medicine

Thoracic outlet syndrome due to cervical rib

Thoracic outlet syndrome due to cervical rib (ICD-11 8B91.1): neurovascular compression at the thoracic outlet caused by an extra rib from C7, found in 1.1% of healthy people but 29.5% of TOS patients.

Thoracic Radiography

Thoracic radiography (chest x-ray, MeSH D013902) is x-ray imaging of the chest and thoracic organs, not only lungs. Standard PA plus lateral views; first-line, low-dose, high-volume exam with limited sensitivity versus CT.

Thoracic Surgical Procedures

Thoracic surgical procedures (MeSH D019616) are operations on chest organs, most commonly lungs and heart, including CABG, lobectomy, VATS, and robotic approaches.

Thoracic vertebrae

Thoracic vertebrae (T1–T12, vertebrae thoracicae) are the twelve middle-spine bones bearing costal facets for rib articulation, forming the kyphotic, least-mobile thoracic segment, with atypical T1, T11, and T12 and transitional T12 anatomy.

Thoracic wall

Thoracic wall (chest wall): the musculoskeletal enclosure of the thorax, bounded by sternum, 12 rib pairs, thoracic vertebrae, and diaphragm, with intercostal muscles, neurovascular bundles, and roles in protection and breathing.

Thoraco-abdominal enteric duplication

Thoraco-abdominal enteric duplication (ORPHA 1759, ICD-10 Q43.4) is a rare syndromic intestinal malformation with tubular cystic lesions spanning diaphragm, causing infant respiratory distress, often with vertebral anomalies.

Thoracoabdominal aortic aneurysm

Thoracoabdominal aortic aneurysm (TAAA), aneurysm spanning the thoracic and abdominal aorta, about 10% of aortic aneurysms; classified by Crawford Extents I-V; treated by open or fenestrated-branched endovascular repair.

Thoracoabdominal aortic aneurysm repair

Thoracoabdominal aortic aneurysm repair is the surgical or endovascular treatment of aneurysms spanning the thoracic and abdominal aorta, classified by Crawford extent and aimed at preventing rupture.

Thoracolaryngopelvic dysplasia

Thoracolaryngopelvic dysplasia, or Barnes syndrome (ORPHA:3317, OMIM 187760), is an extremely rare autosomal dominant short-rib dysplasia with a bell-shaped chest, laryngeal stenosis, and small pelvis; fewer than 10 cases reported and the entity is disputed.

Thoracoplasty

Thoracoplasty is a chest wall operation in which ribs are resected to shrink the chest, eliminating pleural spaces such as chronic empyema or infected postpneumonectomy cavities.

Thoracoscopes

Thoracoscopes (pleuroscopes) are endoscopes for examining the pleural cavity, first used by Jacobaeus in 1910. Rigid, semirigid, and mini instruments differ in biopsy size, maneuverability, and diagnostic yield for pleural disease.

Thoracoscopic esophagectomy

Thoracoscopic esophagectomy is a minimally invasive operation that removes the esophagus through small chest incisions, mainly for esophageal cancer, reducing pulmonary complications versus open surgery.

Thoracoscopic lobectomy

Thoracoscopic lobectomy is minimally invasive surgery that removes an entire lung lobe through small, non-rib-spreading incisions guided by a video camera, used mainly for early-stage non-small cell lung cancer.

Thoracoscopic lung resection

Thoracoscopic lung resection is minimally invasive removal of lung tissue through small incisions without rib spreading, ranging from wedge resection to lobectomy, mainly for lung tumors including early-stage non-small cell lung cancer.

Thoracoscopic surgery

Thoracoscopic surgery is a minimally invasive technique for operating inside the chest through small incisions using a thoracoscope and video display instead of spreading the ribs.

Thoracoscopic thymectomy

Thoracoscopic thymectomy is a minimally invasive operation that removes the thymus gland and surrounding fat through small chest incisions, performed mainly for myasthenia gravis and small thymic tumors.

Thoracoscopy

Thoracoscopy is an endoscopic procedure in which a scope is passed through the chest wall into the pleural cavity to inspect, biopsy, and treat pleural and lung disease.

Thoracostomy

Thoracostomy, including needle thoracostomy, is a clinical procedure that creates an incision or puncture through the chest wall to drain air, fluid, or blood from the pleural space.

Thoracotomy

Thoracotomy: open chest surgery cutting between the ribs to reach lungs or other thoracic organs. Approaches include posterolateral and clamshell; main risks are pain, infection, bleeding, and post-thoracotomy pain syndrome.

Thoralf M. Sundt Jr

Thoralf M. Sundt Jr. (1930–1992) was an American neurosurgeon who chaired the Department of Neurologic Surgery at the Mayo Clinic and developed techniques and instruments for giant intracranial aneurysms.

Thorax

Thorax: the body region between neck and abdomen, enclosed by the rib cage (12 rib pairs, sternum, 12 thoracic vertebrae), containing heart and lungs in mediastinum and pleural cavities; key breathing and trauma anatomy.

Thorough QT study

A thorough QT study is a clinical trial measuring whether a new drug prolongs the ECG QT interval, the principal regulatory test under ICH E14 since 2005.

Thought blocking

Thought blocking: sudden involuntary interruption of the stream of thought and speech, classically described by Bleuler (1911); a Schneider first-rank-related phenomenon, ICD-11 code MB25.3, seen in psychosis and schizophrenia.

Oct 20, 2026

Thought broadcasting

Thought broadcasting: a delusion that one's private thoughts escape the mind and are transmitted to others. A Schneider first-rank symptom with ICD-10 diagnostic significance, historically attributed to Kraepelin (1913), but defined inconsistently and not specific to schizophrenia.

Thought disorder

Formal thought disorder (FTD), or thought disorder, is disturbed form and flow of thinking seen mainly as disorganized speech; hallmark of schizophrenia, also in mania and depression, measured by scales such as TLC, TDI, and TLI.

Thought insertion

Thought insertion (ICD-11 MB26.11) is a psychotic delusion in which a person experiences thoughts in their mind as inserted by an external agent; a Schneider first-rank symptom of schizophrenia, closely tied to auditory verbal hallucinations.

Thought withdrawal

Thought withdrawal (Entzug von Gedanken) is a Schneiderian first-rank symptom of schizophrenia: the experience that one's thoughts are removed from the mind by an external force, historically sufficient for diagnosis but de-emphasized in DSM-5 and ICD-11.

Threatened abortion

Threatened abortion, also called threatened miscarriage, is first-trimester vaginal bleeding with a closed cervix and a viable pregnancy before 20 weeks; about half of affected women miscarry, and progesterone helps only those with prior miscarriage.

Three-dimensional echocardiography

Three-dimensional echocardiography (3DE) is an ultrasound technique that acquires real-time volumetric images of the beating heart, allowing more accurate and reproducible measurement of cardiac chambers and valves than 2D echocardiography.