All articles starting with P
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Periannan Senapathy
Periannan Senapathy is an Indian-born molecular biologist who proposed the split gene theory of exon-intron gene origins and wrote the 1994 book Independent Birth of Organisms.
Periaortic lymph nodes
Periaortic (para-aortic, lumbar) lymph nodes: retroperitoneal nodes along the aorta and IVC draining kidney, adrenal, gonads, and uterine corpus; seven imaging subgroups; PET-CT is the most accurate metastasis test.
Periapical abscess with sinus
Periapical abscess with sinus (ICD-11 DA09.61; dental sinus) is a periapical abscess draining pus through a sinus tract to oral mucosa or skin, treated by root canal therapy or extraction.
Periapical abscess without sinus
Periapical abscess without sinus, also called acute apical or dentoalveolar abscess, is pus at a tooth root tip without a draining sinus tract; ICD-10-CM K04.7, ICD-11 DA09.62, treated by root canal treatment rather than antibiotics.
Periapical periodontitis
Periapical periodontitis, also called apical periodontitis (ICD-11 DA09.7), is inflammation of the tissue around a tooth root apex caused by root canal infection, presenting as granuloma, cyst, or abscess and treated by root canal treatment.
Periapical radiography
Periapical radiography is an intraoral dental X-ray technique that captures an entire tooth, from crown to root tip, used to diagnose caries, root pathology, and periapical disease.
Periapical surgery
Periapical surgery, or apicectomy with root-end filling, is a dental procedure that removes the tip of a tooth root to seal it and clear persistent infection.
Periarthritis of wrist
Periarthritis of wrist (ICD-11 FB55.2) is inflammation of tissues around the wrist joints, an enthesopathy mapping to ICD-10 M77.2, covering tenosynovitis, de Quervain disease, and acute calcific periarthritis.
Peribáñez y el comendador de Ocaña
Peribáñez y el comendador de Ocaña is a three-act play by Lope de Vega, written around 1604–1608, in which a peasant kills the noble pursuing his wife.
Peribonka
Peribonka (Rivière Péribonka) is a 547 km Quebec river, the largest tributary of Lake Saint-Jean, with a 28,200 km² basin, Alcan and Hydro-Québec dams including a 405 MWe plant, and a namesake village tied to Maria Chapdelaine.
Peribsen
Peribsen, also known as Seth-Peribsen, was a king of Egypt's Second Dynasty, ruling c. 2660–2650 BC, the only Egyptian king to place Seth above his serekh.
Peribulbar block
A peribulbar block is a regional anesthesia technique for eye surgery, injecting local anesthetic outside the muscle cone of the orbit; it is the most common regional technique for cataract surgery.
Perica Bukic
Perica Bukić, Croatian water polo player and administrator, born 1966 in Šibenik; two Olympic golds with Yugoslavia (1984, 1988), 1996 silver as Croatia's captain, two world titles, Hall of Fame 2008, later Croatian federation president.
Pericapsular nerve group block
The pericapsular nerve group (PENG) block is an ultrasound-guided regional anesthesia technique introduced in 2018 that injects anesthetic between the psoas tendon and ilium to relieve hip fracture pain while largely sparing motor function.
Pericardial effusion
Pericardial effusion is abnormal fluid accumulation in the pericardial sac around the heart, graded by echocardiography as mild, moderate, or large. Causes include viral pericarditis, tuberculosis, and malignancy; severe cases cause cardiac tamponade requiring pericardiocentesis.
Pericardial window
A pericardial window is a surgical operation removing a small portion of the pericardium, the sac around the heart, so excess fluid drains continuously into the pleural cavity.
Pericardiectomy
Pericardiectomy is a cardiac operation that removes part or all of the pericardium, the sac around the heart, and is the definitive treatment for constrictive pericarditis.
Pericardiocentesis
Pericardiocentesis is needle drainage of fluid from the pericardial sac, the emergency treatment for cardiac tamponade. Echo-guided since 1979, it succeeds in about 97% of cases but recurs more often than surgical drainage.
Pericardiotomy
Pericardiotomy is a surgical incision in the pericardium, the fibrous sac surrounding the heart, to drain accumulated fluid, relieve cardiac tamponade, or give direct access to the heart; a limited-access form is called a pericardial window.
Pericarditis
Pericarditis is inflammation of the pericardium, frequently presenting as sharp chest pain that improves when sitting forward. Most cases have a benign course with treatment like NSAIDs and colchicine.
Pericardium
The pericardium, also known as the pericardial sac or heart sac, is the double-layered fibrous sac enclosing the heart, lubricating its movement and anchoring it within the chest.
Perichondritis of external ear
Perichondritis of external ear (ICD-11 AA04; ICD-10 H61.0) is infection of the perichondrium around outer-ear cartilage, usually after cartilage piercing or trauma, most often caused by Pseudomonas aeruginosa, risking cauliflower ear.
Periciazine
Periciazine (pericyazine, propericiazine; brands Neulactil, Neuleptil) is a sedating piperidine phenothiazine antipsychotic, ATC N05AC01, used for schizophrenia and short-term control of severe anxiety, agitation, and impulsive aggression.
Péricles (musician)
Péricles is a Brazilian pagode singer and composer who fronted Exaltasamba from 1986 to 2012, selling more than 15 million records, and has pursued a solo career since.
Pericles (Περικλῆς)
Pericles (Περικλῆς), ca. 495–429 BC, Athenian statesman and general, son of Xanthippus and Agariste; led Athenian democracy and empire, jury pay, citizenship law of 451/50, Parthenon building program, Funeral Oration, died of plague in 429.
Pericles of Limyra
Pericles of Limyra, also spelled Perikles, was an early 4th-century BC dynast who ruled eastern Lycia, capturing Xanthos and calling himself ruler of the Lycians.
Pericles, Prince of Tyre
Pericles, Prince of Tyre is a 1608 Jacobean romance play, first printed in quarto in 1609, co-authored by Shakespeare and George Wilkins, omitted from the First Folio, and based on the Apollonius of Tyre legend.
Pericopsis elata
Pericopsis elata (afrormosia, African teak, kokrodua) is an endangered Fabaceae timber tree of West and Central African semi-deciduous forest, CITES Appendix II since 1992, traded as logs, sawn wood, and veneer.
Pericoronitis
Pericoronitis is inflammation and infection of gum tissue around a partially erupted tooth, usually a lower wisdom tooth. Local debridement is first-line; antibiotics are reserved for fever, spreading infection, or trismus, though dentists often overprescribe them.
Pericyclic reaction
A pericyclic reaction, or pericyclic process, is an organic reaction in which bonds reorganize in a single concerted step through a cyclic transition state, with no intermediates.