pseudocyst
1. An accumulation of fluid in a cystlike loculus, but without an epithelial or other membranous lining. SYN: adventitious cyst, false cyst. 2. A cyst whose wall is formed by a host cell and not by a parasite. 3. A mass of 50 or more Toxoplasma bradyzoites, found within a host cell, frequently in the brain; formerly called a p., but now considered a true cyst enclosed in its own membrane within the host cell that may rupture to release particles that form new cysts, and apparently is infective to another vertebrate host. SEE ALSO: bradyzoite. [pseudo- + G. kystis, bladder]

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pseu·do·cyst 'süd-ō-.sist n
1) a cluster of toxoplasmas in an enucleate host cell
2) CYSTOID

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n.
a fluid-filled space without a proper wall or lining, within an organ. A pancreatic pseudocyst may develop in cases of chronic pancreatitis or as a complication of acute pancreatitis. As the pseudocyst, which is filled with enzyme-rich pancreatic juice, slowly expands it may cause episodes of abdominal pain accompanied by a rise in the level of enzymes in the blood. It may be felt by abdominal examination or seen by radiology or ultrasound examination. Treatment is by surgical drainage, usually by the technique of joining the pseudocyst to the stomach (marsupialization).

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pseu·do·cyst (sooґdo-sist″) [pseudo- + cyst] 1. an abnormal or dilated cavity resembling a true cyst but not lined with epithelium. Called also adventitious or false cyst. 2. a cluster of bradyzoites, small, comma-shaped forms of Toxoplasma gondii, enclosed by an irregular wall and sometimes containing thousands of organisms. It represents a resting stage, as opposed to the active, motile stage called the tachyzoite. Pseudocysts are found in the tissues, especially muscles and the brain, in chronic (latent) toxoplasmosis. Called also tissue cyst.

Medical dictionary. 2011.

Look at other dictionaries:

  • Pseudocyst — A pseudocyst is a pathological collection of fluid. A pseudocyst may appear to be a true cyst to the naked eye or on a CAT scan. However, it is technically not a cyst. The wall of a true cyst consists of a clearly defined epithelial cell layer.… …   Wikipedia

  • pseudocyst — n. a fluid filled space without a proper wall or lining, within an organ. A pancreatic pseudocyst may develop in cases of chronic pancreatitis or as a complication of acute pancreatitis. As the pseudocyst, which is filled with enzyme rich… …   The new mediacal dictionary

  • pseudocyst — noun A pathological collection of fluid, differing from a cyst in lacking a clearly defined epithelial cell layer …   Wiktionary

  • pseudocyst — pseu·do·cyst …   English syllables

  • pseudocyst — ˈsüdō+ˌ noun Etymology: pseud + cyst 1. : a cluster of toxoplasms in an enucleate host cell 2. : cystoid 1 …   Useful english dictionary

  • Pseudocyst of the auricle — (also known as a Auricular endochondrial pseudocyst, [1] Cystic chondromalacia, [1] Endochondral pseudocyst, [2] and Intracartilaginous cyst [1]) is a cutaneous condition characterized by a fluctuant, tense, noninflammatory swelling on the upper… …   Wikipedia

  • pseudocyst of auricle — auricular pseudocyst, endochondral pseudocyst a benign, asymptomatic swelling of the auricle of the ear, containing fluid …   Medical dictionary

  • Pancreatic pseudocyst — Infobox Disease Name = PAGENAME Caption = ICD10 = ICD10|K|86|3|k|80 ICD9 = ICD9|577.2 DiseasesDB = 9530 ICDO = OMIM = MedlinePlus = 000272 eMedicineSubj = med eMedicineTopic = 2674 eMedicine mult = eMedicine2|radio|576 MeshID = D010192 A… …   Wikipedia

  • paranephric pseudocyst — pararenal pseudocyst, perinephric pseudocyst urinoma …   Medical dictionary

  • Киста Ложная (Pseudocyst) — скопление жидкости в кистоподобной дольке какого либо органа, не имеющей эпителиальной выстилки. Ложная киста поджелудочной железы (pancreatic pseudocyst), например, может образоваться у человека в результате хронического или как осложнение… …   Медицинские термины

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