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Medical Dictionary - Dictionary of Medicine and Human Biology


Medical Dictionary


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pruritus (proo-ri′tus)
1. SYN: itching. 2. SYN: itch (1) . [L. an itching, fr. prurio, to itch] p. aestivalis p. occurring during hot weather; may be associated with prickly heat. SYN: summer itch. p. ani itching of varying intensity at the anus; may be paroxysmal or constant, associated with seborrheic dermatitis or moniliasis, with irritated and enlarged hemorrhoidal veins, or may occur independently of any cutaneous lesions in association with systemic disease. aquagenic p. intense itching produced by brief contact with water at any temperature without visible changes in the skin. bath p. itching produced by inadequate rinsing off of soap or by overdrying of skin from excessive bathing. SYN: bath itch. essential p. itching that occurs independently of skin lesions. p. gravidarum severe p. without associated rash occurring during pregnancy secondary to intrahepatic cholestasis and bile salt retention. p. hiemalis SYN: winter itch. p. senilis, senile p. itching associated with dryness of the skin in the aged. symptomatic p. itching occurring as a symptom of some systemic disease. p. vulvae itching of the external female genitalia, caused by a variety of factors, e.g., seborrheic dermatitis, allergy to local contactants, senile atrophy of the vulva, and occasionally systemic disease.

Prussak
Alexander, Russian otologist, 1839–1897. See P. fibers, under fiber, P. pouch, P. space.

Prussian blue [C.I. 77510]
SYN: Berlin blue.

prussiate (prush′e-at, prus′e-at)
1. A cyanide; a salt of hydrocyanic acid. 2. A ferricyanide or ferrocyanide.

prussic acid (prus′ik)
SYN: hydrocyanic acid.

PSA
Abbreviation for prostate-specific antigen.

psalterial (sawl-ter′e-al)
Relating to the psalterium.

psalterium, pl .psalteria (sawl-ter′e-um, sawl-ter′e-a)
SYN: commissura fornicis. [G. psalterion, harp]

psammo-
Sand. [G. psammos]

psammocarcinoma (sam′o-kar-si-no′ma)
Obsolete term for a carcinoma that contains calcified foci resembling psammoma bodies.

psammoma (sa-mo′ma)
Obsolete term for psammomatous meningioma or meningioma. [psammo- + G. -oma, tumor] Virchow p. SYN: psammomatous meningioma.

psammomatous (sa-mo′ma-tus)
Possessing or characterized by the presence of psammoma bodies; refers usually to certain types of meningioma or to meningeal hyperplasia with psammoma bodies.

psammous (sam′us)
Sandy. [G. psammos, sand]

Psaume
J., 20th century French physician. See Papillon-Léage and P. syndrome.

PSE
Abbreviation for Pidgin Sign English.

psellism (sel′izm)
SYN: stammering. [G. psellismos, a stammering]

pseud-
See pseudo-.

pseudacromegaly (soo-dak-ro-meg′a-le)
Enlargement of the extremities and face, not caused by acromegaly.

pseudagraphia (soo-da-graf′e-a)
Partial agraphia in which one can do no original writing, but can copy correctly. SYN: pseudoagraphia. [pseud- + G. a- priv. + grapho, to write]

pseudalbuminuria (soo′dal-bu-mi-noo′re-a)
Albuminuria that is not associated with renal disease. SYN: pseudoalbuminuria.

Pseudallescheria boydii (sood′al-es-ke′re-a boy′de-i)
A species of fungus that causes eumycotic mycetoma and pseudallescheriasis; its conidial (asexual) state is Scedosporium apiospermum; formerly called Allescheria boydii.

pseudallescheriasis (sood′al-es-ke′ri-a-sis)
A variety of clinical diseases resulting from infection with Pseudallescheria boydii; e.g., bronchial colonization, and invasive pneumonitis, as well as mycotic keratitis, endophthalmitis, endocarditis, meningitis, sinusitis, brain abscesses, cutaneous and subcutaneous infections, and disseminated systemic infections.

Pseudamphistomum (soo-dam-fis′to-mum)
A genus of digenetic flukes of the family Opisthorchiidae; P. truncatum is a species that infects the bile ducts of the dog and cat (rarely of humans) in Europe and India. [pseud- + G. amphi, two-sided, + stoma, mouth]

pseudangina (soo′dan-ji′na, soo-dan′ji-na)
SYN: angina pectoris vasomotoria.

pseudankylosis (soo-dang′ki-lo′sis)
SYN: fibrous ankylosis.

pseudarthrosis (soo-dar-thro′sis)
A new, false joint arising at the site of an ununited fracture. SYN: false joint, pseudoarthrosis. [pseud- + G. arthrosis, a joint]

pseudelminth (soo-del′minth)
Anything having the appearance of an intestinal worm. [pseud- + G. helmins, worm]

pseudesthesia (soo-des-the′ze-a)
1. SYN: paraphia. 2. A subjective sensation not arising from an external stimulus. SYN: pseudoesthesia (2) . 3. SYN: phantom limb pain. [pseud- + G. aisthesis, sensation]

pseudo- (psi) , pseud-
False (often used about a deceptive resemblance). [G. pseudes]

pseudoacanthosis nigricans (soo′do-ak-an-tho′sis ni′gri-kanz)
Acanthosis nigricans secondary to maceration of the skin from excessive sweating, or occurring in obese and dark-complexioned adults, or in association with endocrine disorders; not associated with visceral cancer.

pseudoacephalus (soo′do-a-sef′a-lus)
An apparently headless placental parasitic twin that, however, has rudimentary cephalic structures that can be demonstrated by dissection. [pseudo- + G. a- priv. + kephale, head]

pseudoachondroplasia (soo′do-a-kon-dro-pla′se-a)
A skeletal dysplasia characterized by short-limb dwarfism with leg deformities associated with genu varum or genu valgum and ligamentous laxity, allowing the joints to telescope; normal appearing head and face. Autosomal dominant inheritance [MIM*177150 and MIM*177170] caused by mutation in the cartilage oligomeric matrix protein gene (COMP) on 19p. SYN: pseudoachondroplastic spondyloepiphysial dysplasia.

pseudoactinomycosis (soo′do-ak′ti-no-mi- ko′sis)
SYN: para-actinomycosis.

pseudoagglutination (soo′do-a-gloo-ti-na′shun)
1. Agglomeration of particles in solution that does not involve antigen-antibody combination. SYN: false agglutination. 2. SYN: rouleaux formation.

pseudoagrammatism (soo′do-a-gram′a-tizm)
SYN: paraphasia. [pseudo- + G. a- priv. + gramma, writing, + -ismos, condition]

pseudoagraphia (soo′do-a-graf′e-a)
SYN: pseudagraphia.

pseudo-ainhum (soo′do-in′um)
Nonspontaneous amputation of a digit, caused by a variety of disorders such as neural leprosy, syringomyelia, and palmoplantar keratoderma.

pseudoalbuminuria (soo′do-al-bu′mi-noo′re-a)
SYN: pseudalbuminuria.

pseudoalkaloids (soo′do-al-ka-loydz)
A group of compounds that are structurally similar to alkaloids.

pseudoallelic (soo′do-a-le′lik)
Relating to pseudoallelism.

pseudoallelism (soo-do-a-le′lizm)
Relationship of two or more loci that are difficult to distinguish from a single locus by classical genetic analysis. For instance, the states of the D, D, and E components of the Rh blood locus [MIM*111700] are so far unresolved.

pseudo-alopecia areata (soo′do-al-o-pe′she-a ar-e-a′ta)
Alopecia in which mild inflammatory changes develop at the orifices of the affected hair follicles.

pseudoanaphylactic (soo′do-an-a-fi-lak′tik)
SYN: anaphylactoid.

pseudoanaphylaxis (soo′do-an-a-fi-lak′sis)
A condition resembling anaphylaxis, but not due to specific antigen-antibody reaction. SYN: anaphylactoid crisis (2) .

pseudoanemia (soo′do-a-ne′me-a)
Pallor of the skin and mucous membranes without the blood changes of anemia. SYN: false anemia.

pseudoaneurysm (soo-do-an′u-rizm)
1. Pulsating, encapsulated hematoma in communication with the lumen of a ruptured vessel. 2. Ventricular p., a cardiac rupture contained and loculated by pericardium, which forms its external wall. 3. An aneurysm whose walls consist of adventitia and periarterial fibrous tissue and hematoma. SYN: communicating hematoma, false aneurysm, pulsatile hematoma.

pseudoangina (soo′do-an′ji-na, -an-ji′na)
SYN: angina pectoris vasomotoria.

pseudoanodontia (soo′do-an-o-don′she-a)
Clinical absence of teeth due to a failure in eruption. [pseudo- + G. an- priv. + odous, tooth]

pseudoappendicitis (soo′do-a-pen-di-si′tis)
A symptom complex simulating appendicitis without inflammation of the appendix.

pseudoapraxia (soo′do-a-prak′se-a)
A condition of exaggerated awkwardness in which the person makes wrong use of objects.

pseudoarthrosis (soo′do-ar-thro′sis)
SYN: pseudarthrosis.

pseudoauthenticity (soo′do-aw-then-ti′si-te)
False or copied expression of thoughts and feelings. [pseudo- + G. authentikos, original]

pseudobacillus (soo′do-ba-sil′us)
Any microscopic object, such as a poikilocyte, resembling a bacillus.

pseudobacterium (soo′do-bak-ter′e-um)
Any microscopic object resembling a small bacillary organism or other bacterial form.

pseudobulbar (soo-do-bul′bar)
Denoting a supranuclear paralysis of the bulbar nerves.

pseudocartilage (soo-do-kar′ti-lij)
SYN: chondroid tissue (1) .

pseudocartilaginous (soo′do-kar-ti-laj′i-nus)
Composed of a substance resembling cartilage in texture.

pseudocast (soo′do-kast)
SYN: false cast.

pseudocele (soo′do-sel)
SYN: cavity of septum pellucidum. [pseudo- + G. koilia, cavity]

pseudocelom (soo-do-se′lom)
A partial or false celom, typical of Nematoda (roundworms) and related phyla, in which the body cavity is lined by mesoderm along only one surface (hypodermis, under the cuticular body wall). Cf.:celom, acelom. [pseudo- + G. koiloma, hollow]

pseudocephalocele (soo-do-sef′a-lo-sel)
Acquired herniation of intracranial tissues caused by injury or disease. [pseudo- + G. kephale, head, + kele, tumor]

pseudochancre (soo-do-shang′ker)
A nonspecific indurated sore, usually located on the penis, resembling a chancre.

pseudocholinesterase (soo′do-kol-in-es′ter-as)
SYN: butyrocholinesterase. atypical p. [MIM*177400, MIM*177500, MIM*177600] a genetic variant of cholinesterase that fails to catalyze the hydrolysis of succinylcholine. SEE ALSO: dibucaine number, fluoride number. typical p. a cholinesterase formed in the liver and present in plasma; it catalyzes the hydrolysis of succinylcholine, first into succinylmonocholine and choline and then into choline and succinic acid.

pseudochorea (soo-do-kor-e′a)
A spasmodic affection or extensive tic resembling chorea.

pseudochromesthesia (soo′do-kro-mes-the′ze-a)
An anomaly in which each vowel in the printed word is seen as colored. SEE ALSO: photism, color hearing. [pseudo- + G. chroma, color, + aisthesis, sensation]

pseudochromidrosis, pseudochromhidrosis (soo′do-kro-mi-dro′sis, -hi-dro′sis)
The presence of pigment on the skin in association with sweating, but due to the local action of pigment-forming bacteria and not to the excretion of colored sweat. [pseudo- + G. chroma, color, + hidros, sweat]

pseudochylous (soo-do-ki′lus)
Resembling chyle.

pseudocirrhosis (soo′do-si-ro′sis)
SYN: cardiac cirrhosis.

pseudoclonus (soo-do-klo′nus)
Unsustained clonic response despite continued force to elicit it.

pseudocoarctation (soo′do-ko-ark-ta′shun)
Distortion, often with slight narrowing, of the aortic arch at the level of insertion of the ligamentum arteriosum. SYN: buckled aorta, kinked aorta.

pseudocolloid (soo-do-kol′oyd)
A colloid-like or mucoid substance found in ovarian cysts and elsewhere.




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