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Medical Dictionary - Dictionary of Medicine and Human Biology

Medical Dictionary


pseudodeciduosis (soo′do-de-sid-u-o′sis)
A decidual response of endometrium in the absence of pregnancy. [pseudo- + L. deciduus, falling off]

pseudodementia (soo′do-de-men′she-a)
A condition resembling dementia but usually due to a depressive disorder rather than brain dysfunction.

pseudodextrocardia (soo′do-deks′tro-kar′de-a)
Displacement of the heart to the right, either congenital or due to trauma, with all the chambers and vessels in their correct positions.

pseudodiabetes (soo′do-di-a-be′tez)
A condition in which a false positive test for sugar in the urine occurs.

pseudodiastolic (soo′do-di-as-tol′ik)
Seemingly associated with cardiac diastole.

pseudodigitoxin (soo′do-dij-i-tok′sin)
SYN: gitoxin.

pseudodiphtheria (soo′do-dif-ther′e-a)
SYN: diphtheroid (1) .

pseudodipsia (soo-do-dip′se-a)
SYN: false thirst. [pseudo- + G. dipsa, thirst]

pseudodiverticulum (soo′do-di-ver-tik′u-loom)
An outpouching from the lumen into an area of central necrosis within a large smooth muscle tumor, along any part of the intestinal wall.

pseudodominance (soo-do-dom′i-nans)
SYN: quasidominance.

pseudodysentery (soo-do-dis′en-tar-e)
Occurrence of symptoms indistinguishable from those of bacillary dysentery, due to causes other than the presence of the specific microorganisms of bacillary dysentery.

pseudoephedrine hydrochloride (soo′do-e-fed′rin)
The naturally occurring isomer of ephedrine; a sympathomimetic amine with actions and uses similar to those of ephedrine.

pseudoerysipelas (soo′do-er-i-sip′e-las)
SYN: erysipeloid.

pseudoesthesia (soo-do-es-the′ze-a)
1. SYN: paraphia. 2. SYN: pseudesthesia (2) . 3. SYN: phantom limb pain.

pseudoexfoliation (soo′do-eks-fo-le-a′shun)
A condition simulating exfoliation in some respects, but in which the surface layer is not actually detached. p. of lens capsule deposition in all parts of the eye, including the lens capsule, of a material derived from basement membranes. If this material clogs the trabecular meshwork, impeding the outflow of aqueous humor from the eye, glaucoma may result. See exfoliation syndrome, pseudoexfoliative glaucoma.

pseudofluctuation (soo′do-fluk-choo-a′shun)
A wavelike sensation, resembling fluctuation, obtained by tapping muscular tissue.

pseudofolliculitis (soo′do-fo-lik-u-li′tis)
Erythematous follicular papules or, less commonly, pustules resulting from close shaving of very curly hair; growing tips of hairs consequently reenter the skin adjacent to the follicle producing ingrown hairs; p. of the beard area is very common in blacks.

pseudofracture (soo-do-frak′choor)
A condition in which a radiograph shows formation of new bone with thickening of periosteum at site of an injury to bone.

pseudofructose (soo-do-fruk′tos)
SYN: psicose.

pseudoganglion (soo-do-gang′gle-on)
A localized thickening of a nerve trunk having the appearance of a ganglion.

pseudogene (soo′do-jen)
1. A sequence of nucleotides that is not transcribed and therefore has no phenotypic effect. 2. An inactive DNA segment that arose by a mutation of a parental active gene.

pseudogeusesthesia (soo′do-gu-ses-the′ze-a)
SYN: color taste. [pseudo- + G. geusis, taste, + aisthesis, sensation]

pseudogeusia (soo-do-gu′se-a)
A subjective taste sensation not produced by an external stimulus. [pseudo- + G. geusis, taste]

pseudoglanders (soo-do-glan′derz)
SYN: melioidosis.

pseudoglioma (soo′do-gli-o′ma)
Any intraocular opacity liable to be mistaken for retinoblastoma.

pseudoglobulin (soo′do-glob′oo-lin)
The fraction of the serum globulin that is more soluble in an ammonium sulfate solution than is the euglobulin fraction.

pseudoglomerulus (soo′do-glo-mer′u-lus)
A structure within a neoplasm microscopically resembling a renal glomerulus but not representing renal glomerular differentiation.

pseudoglucosazone (soo′do-gloo-ko′sa-zon)
A substance sometimes present in normal urine that gives a reaction in the phenylhydrazine test.

pseudogout (soo′do-gowt) [MIM*118600]
Acute episodic synovitis caused by deposits of calcium pyrophosphate crystals rather than urate crystals as in true gout; associated with articular chondrocalcinosis; the genetics is unclear. SYN: calcium gout.

pseudogynecomastia (soo′do-gi-ne-ko-mas′te-a, -jin-e-ko-)
Enlargement of the male breast by an excess of adipose tissue without any increase in breast tissue. [pseudo- + G. gyne, woman, + mastos, breast]

pseudohematuria (soo′do-hem-a-too′re-a)
A red pigmentation of urine caused by certain foods or drugs, and thus not actually hematuria. SYN: false hematuria.

pseudohemoptysis (soo′do-he-mop′ti-sis)
Spitting of blood that does not come from the lungs or bronchial tubes. [pseudo- + G. haima, blood, + ptysis, a spitting]

pseudohermaphrodite (soo′do-her-maf′ro-dit)
An individual exhibiting pseudohermaphroditism.

pseudohermaphroditism (soo′do-her-maf′ro-di-tizm)
A state in which the individual is of an unambiguous gonadal sex ( i.e., possesses either testes or ovaries) but has ambiguous external genitalia. Cf.:steroid 5α-reductase. SYN: false hermaphroditism. female p. [MIM*264270] p. with skeletal and genital anomalies but with female gonads and an XX karyotype. SYN: androgynism, androgyny (1) . male p. [MIM*261550, MIM*264300, MIM*312100] p. in which the gonads are male and the karyotype is XY but with genital anomalies.

pseudohernia (soo-do-her′ne-a)
Inflammation of the scrotal tissues or of an inguinal gland, simulating a strangulated hernia.

pseudoheterotopia (su′do-het-er-o-to′pe-a)
A seeming displacement of certain tissues observed postmortem; actually an artifact, rather than a true heterotopia.

pseudohydrocephaly (soo′do-hi-dro-sef′a-le)
Condition characterized by an enlargement of the head without concomitant enlargement of the ventricular system.

pseudohydronephrosis (soo′do-hi-dro-ne-fro′sis)
Presence of a cyst near the kidney, simulating hydronephrosis.

pseudohyperkalemia (soo′do-hi′per-kal-e′e-a)
A spurious elevation of the serum concentration of potassium occurring when potassium is released in vitro from cells in a blood sample collected for a potassium measurement. This may be a consequence of disease ( i.e., myeloproliferative disorders with marked leukocytosis or thrombocytosis) or as a result of improper collection technique with in vitro hemolysis. [pseudo + G. hyper, above + L. kalium, potassium, G. haima, blood]

pseudohyperparathyroidism (soo′do-hi′per-par-a-thi′roy-dizm)
Hypercalcemia in a patient with a malignant neoplasm in the absence of skeletal metastases or primary hyperparathyroidism; believed to be due to formation of parathyroid-like hormone by nonparathyroid tumor tissue.

pseudohypertelorism (soo′do-hi-per-tel′or-izm)
An appearance of excessive distance between the eyes (ocular telorism) due to lateral displacement of the inner canthi. See Waardenburg syndrome.

pseudohypertrophic (soo′do-hi-per-trof′ik)
Relating to or marked by pseudohypertrophy.

pseudohypertrophy (soo′do-hi-per′tro-fe)
Increase in size of an organ or a part, due not to increase in size or number of the specific functional elements but to that of some other tissue, fatty or fibrous. SYN: false hypertrophy.

pseudohypha (soo-do-hi′fa)
A chain of easily disrupted fungal cells that is intermediate between a chain of budding cells and a true hypha, marked by constrictions rather than septa at the junctions. [pseudo- + G. hyphe, a web (hypha)]

pseudohyponatremia (soo′do-hi-po-na-tre′me-a)
A low serum sodium concentration due to volume displacement by massive hyperlipidemia or hyperproteinemia; also used to describe the low serum sodium concentration that may occur with high blood glucose.

pseudohypoparathyroidism (soo′do-hi′po-par-a-thi′royd-izm) [MIM*103580]
A disorder resembling hypoparathyroidism, with high serum phosphate and low calcium levels but with normal or elevated serum parathyroid hormone levels; the defect is due to lack of end-organ responsiveness to parathyroid hormone. There are two types: type I shows lack of renal tubular response to exogenous parathyroid hormone with increase in urinary cAMP, type Is has type I skeletal defects (SYN Albright hereditary osteodystrophy), and type II is associated with a defect at a locus after cAMP production. X-linked dominant inheritance caused by mutation in the gene encoding guanine nucleotide-binding protein α-stimulating activity polypeptide 1 (GNAS1), which regulates adenyl cyclase on chromosome 20q. Cf.:thyrotropin resistance. p. type Ia p. believed to be due to a defect in the G protein associated with adenylate cyclase (probably autosomal dominant). p. type Ib p. due to a defect in the adenylate cyclase complex.

pseudoicterus (soo-do-ik′ter-us)
Yellowish discoloration of the skin not due to bile pigments, as in Addison disease. SYN: pseudojaundice.

pseudoileus (soo-do-il′e-us)
Absolute obstipation, stimulating ileus, due to paralysis of the intestinal wall.

pseudoinfarction (soo-do-in-fark′shun)
Any condition mimicking myocardial infarction, for example, acute pericarditis, dissecting aneurysm of the aorta, etc.

pseudoinfluenza (soo′do-in-floo-en′za)
An epidemic catarrh simulating influenza, but less severe.

pseudointraligamentous (soo′do-in′tra-lig-a-men′tus)
Falsely giving the impression of lying within the broad ligament; e.g., a p. tumor.

pseudoisochromatic (soo′do-i-so-kro-mat′ik)
Apparently of the same color; denoting certain charts containing colored spots mixed with figures printed in confusion colors; used in testing for color vision deficiency.

pseudoisoenzymes (soo′do-i-so-en′zimz)
Multiple forms of enzymes that catalyze the same reaction and have the same amino acid sequence; differences are due to effects of some posttranslational modification.

pseudojaundice (soo-do-jawn′dis)
SYN: pseudoicterus.

pseudokeratin (soo-do-kar′a-tin)
A protein extracted from epidermis and nervous tissue (glial fibrils), probably involved in keratinization.

pseudolipoma (soo′do-li-po′ma)
Any circumscribed, soft, smooth, usually movable swelling or tumefaction that grossly resembles a lipoma.

pseudolithiasis (soo′do-li-thi′a-sis)
A disorder resembling one of the syndromes associated with a stone in a hollow viscus or elsewhere. [pseudo- + G. lithos, stone]

pseudologia (soo-do-lo′je-a)
Pathologic lying in speech or writing. [pseudo- + G. logos, word] p. phantastica an elaborate and often fantastic account of a patient's exploits, which are completely false but which the patient appears to believe.

pseudolymphocyte (soo-do-lim′fo-sit)
A small neutrophilic leukocyte with a single round nucleus, characteristic of the rare homozygous Pelger-Huët anomaly.

pseudolymphoma (soo′do-lim-fo′ma)
A benign infiltration of lymphoid cells or histiocytes that microscopically resembles a malignant lymphoma. cutaneous p. SYN: benign lymphocytoma cutis.

pseudolysogenic (soo′do-li-so-jen′ik)
Pertaining to pseudolysogeny.

pseudolysogeny (soo′do-li-soj′e-ne)
The condition in which a bacteriophage is maintained (carried) in a culture of a bacterial strain by infecting susceptible variants of the strain, in contradistinction to true lysogeny in which the bacteriophage genome multiplies as an integral part of the bacterial genome.

pseudomalignancy (soo′do-ma-lig′nan-se)
A benign tumor that appears, clinically or histologically, to be a malignant neoplasm. SEE ALSO: pseudotumor.

pseudomamma (soo-do-mam′a)
Obsolete term for a glandular structure resembling the mammary gland, occurring in dermoid cysts.

pseudomania (soo-do-ma′ne-a)
1. A factitious mental disorder. 2. A mental disorder in which the patient falsely claims to have committed a crime. 3. Generally, the morbid impulse to falsify or lie, as in pseudologia.

pseudomasturbation (soo′do-mas-ter-ba′shun)
A behavior that simulates genital stimulation.

Enlargement of the distal colon with sluggish muscular function without the neurologic abnormalities of congenital megacolon (Hirschsprung disease).

pseudomelanosis (soo′do-mel-a-no′sis)
A dark greenish or blackish postmortem discoloration of the surface of the abdominal viscera, resulting from the action of sulfureted hydrogen upon the iron of disintegrated hemoglobin. [pseudo- + G. melas, black]

pseudomembrane (soo-do-mem′bran)
SYN: false membrane.

pseudomeningitis (soo′do-men-in-ji′tis)
SYN: meningism.

pseudomenstruation (soo′do-men-stroo-a′shun)
Uterine bleeding without the typical premenstrual endometrial changes.

pseudometaplasia (soo′do-met-a-pla′ze-a)
SYN: histologic accommodation.


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