Glossary of Medical Terms Flashcards
abscess
a localized collection of pus in a cavity formed by disintegration of tissues
acute
a disease with sudden onset of signs and a short course
adenocarcinoma
a malignant tumour originating in glandular tissue
adenoma
a benign tumour made up of glandular elements
adenosis
a disease of a gland, often marked by the abnormal formation or enlargement of glandular tissue
agenesis
absence or failure of formation of any part or organ
agglutination
clumping together of cells or particles
aggregation
a total or coming together of separate parts
amenorrhea
the absence of menstrual bleeding
amyloid
the extracellular protein substance deposited in amyloidosis. It is a waxy, amorphous, eosinophilic, hyaline like material that exhibits red-green birefringence under polarized light when stained with Congo red.
amyloidosis
a group of conditions of diverse aetiologies characterized by the accumulation of insoluble fibrillar proteins (amyloid) in various organs and tissues of the body - eventually organ function is compromised. The associated disease states may be inflammatory, hereditary or neoplastic and the deposition may be local or generalized or systemic
analgesia (analgesic)
the absence of pain; removing pain
anaphylaxis
the immediate immunologic (allergic) reaction initiated by the combination of antigen (allergen) with mast cell cytophilic antibody (chiefly IgE). anaphylactic (adj) - as in anaphylactic shock - life threatening respiratory distress, vascular collapse and shock; manifesting extremely great sensitivity to foreign protein or other material.
anaplasia
loss of differentiation of cells and of their orientation to one another and to their framework and blood vessels
anastomosis
a connection between two blood vessels or tubes
anencephaly
markedly defective development of the brain, cerebral hemispheres absent or reduced to small masses, together with absence of the bones of the cranium
aneurysm
a ballooning out of the wall of a blood vessel or a heart chamber due to a weakening of the wall by disease or injury
angina
spasmodic, choking or suffocating pain
angina pectoris
paroxysmal pain in the chest often radiating to the arms; usually due to interference with the supply of oxygen to the heart muscle; often precipitated by excitement or effort
angiogenesis
the formation of new blood vessels
anomaly
an irregularity or deviation from normal; an abnormal structure
antibody
an immunoglobulin molecule that reacts with a specific antigen that induced its synthesis. Synthesized by B lymphocytes that have been activated by the binding of a antigen to a cell surface receptor
antigen
any substance, almost always a protein, not normally present in the body which when introduced to the body stimulates a specific immune response and the production of antibodies
aphasia
partial or complete loss of the ability to speak, write or understand spoken or written language, resulting from damage to the brain by injury or disease
apnea
lack of breathing
apocrine
a form of secretion in which a portion of the cytoplasm leaves the cell together with the product of secretion
apoptosis
programmed cell death (carefully orchestrated by genes and gene products that turn the pathway to cell death on or off); fragmentation of the cell into membrane-bound particles that are eliminated by phagocytosis; from the Greek for “falling off”
arrhythmia(s)
irregular heart beat
ascites
accumulation of serous fluid in the abdominal cavity
asymptomatic
producing or showing no symptoms
ataxia
failure of muscle coordination; unable to coordinate muscle movement resulting in jerkiness and incoordination
ATP
adenosine triphosphate. A chemical very important in energy metabolism in the cell
atrophy
a wasting away; a decrease in the size and function of a cell, tissue, organ or part
atypical
unusual, not characteristic
auscultation
listening for sounds within the body; it may be performed with the unaided ear or with a stethoscope.
bacteremia
the presence of bacteria in the blood
benign
not malignant; not recurrent; favourable for recovery
bifurcation
the split of a tube or vessel into two branches or channels
birefringent
birefringence; the quality of transmitting light unequally in different directions
biopsy
removal and examination, usually microscopic, of tissue from the living body, performed to establish a precise diagnosis
bradycardia
abnormally slow heart action
bronchiectasis
chronic dilatation of the bronchi. It may affect the tube uniformly or occur in irregular pockets
bronchus
one of the large passages conveying air to and within the lungs
bronchoscope
n instrument used for inspecting the interior of the windpipe and bronchial tree to carry out diagnostic (taking specimens for culture and biopsy) or therapeutic (removing a foreign object) manoeuvres
bronchoscopy
examination of the bronchi through a bronchoscope
BUN - blood urea nitrogen
the urea concentration of serum or plasma, specified in terms of nitrogen content; an important indicator of renal function. (urea is the chief nitrogenous end-product of protein metabolism, formed in the liver from amino acids and from ammonia compounds)
cachexia
extreme loss of weight and body wasting associated with serious illness
calculus
a stone developing in the body, e.g. kidney or bile
carbuncle
deep-seated pus-producing infection of the skin and subcutaneous tissues
carcinogen
a substance that causes cancer
cardi(o)
of the heart
cardiomegaly
hypertrophy (enlargement) of the heart
caries
destruction of bone or teeth
caseous
“cheesy” or “cheese-like”
caseous necrosis
cell death characteristic of certain inflammations (e.g. tuberculosis) where the affected tissue shows the crumbly consistency and dull, opaque quality of cheese. Based on casein - the principal protein of milk, the basis of curds and cheese
catarrh
inflammation of a mucous membrane with increased flow of mucous. catarrhal (adj.)
caudal
situated toward or pertaining to the tail; toward the inferior or posterior end of the body
cellulitis
inflammation of the soft or connective tissue in which a thin, watery exudate spreads through the tissue spaces
cephalic
pertaining to the head , or to the head end of the body
chemotaxis
movement of cells or organisms in response to chemical stimulation. chemotactic (adj.).
cholangitis
inflammation of a bile duct or the entire biliary tree
cholecyst
the gallbladder
cholelithiasis
presence of concretions (“gall stones”) in the gallbladder or bile ducts
chronic
a condition with slow onset, mild but continuous manifestations and long-lasting, often progressive effects
ciliated
cilia are small hair-like structures which help to transport secretions along the surface of a cell
CIN
cervical intraepithelial neoplasia; one of the terminologies in use to describe precancerous or dysplastic changes in the cervical epithelial cells
CIS
carcinoma in situ; a neoplasm where the tumor cells are still confined to the epithelium of origin without invasion of the basement membrane (likelihood of subsequent invasive growth is presumed to be high).
clubbing
proliferation of soft tissue about the ends (terminal phalanges) of fingers and toes
CMV
cytomegalovirus.
coagulate
to cause to clot or become clotted; to convert a fluid or substance in solution into a solid or a gel. coagulative (adj.)
coagulative necrosis
a type of necrosis in which affected cells or tissue are converted into a dry, dull, homogeneous eosinophilic mass without nuclei as a result of the coagulation of protein
collateral (blood supply)
new vessels which develop following chronic interruption of blood supply
colposcope
a speculum for examining the vagina and cervix with a magnifying lens. (colposcopy is the procedure).
congestion
abnormal accumulation of blood or fluid in a part
columnar (cells)
refers to a shape of cells which often line ducts or glands within the body
coma
a state of profound unconsciousness from which one cannot be roused
congenital
present at birth; cause may be genetic or non-genetic (infectious, chemical, physical)
Congo red
specific stain for detection of amyloid fibrils. Proteins with a beta-pleated sheet structure will display red-green birefringence under polarized light.
contralateral
the opposite side of the body
contusion
a bruise; an injury of a part without a break in the skin, characterized by swelling, discoloration, and pain.
cor pulmonale
right-sided heart failure which occurs as a result of long-standing lung disease
creatine
an amino acid; found in muscle. Phosphorylated creatine is an important storage form of high-energy phosphate = creatine phosphate or phosphocreatine. Energy source for muscle contraction.
creatine kinase
an enzyme that catalyses the phosphorylation of creatine by ATP to form phosphocreatine.
cribriform
perforated, sieve-like pattern
cruciate
shaped like a cross.
cryptorchid
a person with undescended testes
cryptorchism (cryptorchidism)
failure of one or both testes to descend into the scrotum
CT (computerized tomograph)
sophisticated radiologic technique yielding a detailed image of internal body structures
CAT
computerized axial tomography.
cyanosis
a bluish discoloration of skin, lips, nail beds or mucous membranes due to excessive concentrations of reduced haemoglobin in blood and hence deficient oxygenation of blood. cyanotic (adj.).
cyst
any closed epithelium-lined cavity or sac, normal or abnormal, usually containing liquid or semisolid material; a bladder.
cystectomy
removal of a cyst; removal or resection of the bladder
cytology
the study of cells, their origin, structure, function and pathology; the microscopic examination of cells as a means of detecting malignancy and microbiologic changes. Cells can be obtained by aspiration, washing, smear or scraping.
cytotoxin - (cytotoxic = adj.),
a toxin or antibody having a specific toxic action upon the cells of special organs.
DES
diethylstilboestrol; a synthetic nonsteroidal oestrogen; females exposed to it in utero are subject to increased risk of vaginal and cervical carcinoma
degenerative
progressive and often irreversible deterioration.
dialysis
a procedure by which a machine is used to replace kidney functions in patients with diseased kidneys.
diapedesis
the passage of leukocytes (white blood cells) through capillary walls to site of inflammation.
diaphoresis
perspiration, especially profuse perspiration.
differentiation
the distinguishing of one thing from another; the act or process of acquiring completely individual characters; increase in morphological or chemical heterogeneity.
dilation
the act of dilating or stretching
dilatation
the condition of being stretched beyond normal dimensions, usually in a tubular structure or an opening.
diuresis
excessive amount of urine
diuretic
produces an increase in amount of urine.
diverticulum (diverticula = pl)
a pouch or sac occurring normally or created by the bulging of a membrane through a defect in the muscular coat of a tubular organ, such as the intestine
diverticulosis
the presence of diverticula.
diverticulitis
an inflammation of a diverticulum, especially those in the wall of the colon which fill with faecal matter and become inflamed. May cause bleeding or obstruction or may burst.
duct
a passage with well-defined walls, especially a tubular structure for the passage of excretions or secretions.
dysmenorrhea
painful menstruation.
dysphagia
painful or difficulty swallowing
dysplasia
abnormality of development; in pathology, alteration in size, shape, and organization of adult cells.
dyspnea
laboured or difficult breathing.
dysrhythmia
defective heart rhythm
ecchymosis
a small haemorrhagic spot in the skin or mucous membrane, larger than apetechia, forming a nonelevated, rounded, or irregular blue or purplish patch. ecchymoses, pl.
ectasia
dilatation, expansion or distention. e.g. duct ectasia = dilatation of duct plugged with secretion, accompanied by periductal and interstitial inflammatory infiltrate.
ectopic
out of place; an object or organ situated in an unusual place away from its normal position.
oedema
the accumulation of excess fluid in the intercellular or interstitial tissue spaces or body cavities.
efferent
moving away from the centre, e.g. efferent nerve fibres carry motor impulses to muscles.
effusion(s)
the escape of a fluid into a part; the effused material
electrolyte
a compound when dissolved in water separates into charged particles. Electrolytes play an essential role in the workings of cells maintaining fluid balance and acid-base balance
embolus (emboli, pl.)
a detached intravascular solid, liquid or gaseous mass that is carried by the blood to a site distant from its point of origin, thus obstructing the flow of blood. Most (99%) arise from thrombi (thromboembolus).
embolism
the sudden obstruction or blocking of a vessel by an embolus
emesis
the act of vomiting.
empyema
accumulation of pus in a body cavity.
encephalitis
inflammation of the brain.
endocarditis
inflammation of the endocardium
endocardium
the innermost tunic of the heart (includes endothelial and subendothelial connective tissue)
endogenous
originating from within the body.
endometriosis
presence of benign glands and uterine stroma (connective tissue elements) outside of the uterus
endoscope
an instrument to visually examine the interior of a hollow organ such as the colon, intestine or bladder; endoscopy is the procedure
enzyme
a substance, usually a protein, that initiates and accelerates a chemical reaction.
eosin
any of a class of rose-coloured stains or dyes; bromine derivatives of fluorescein; used in histology as a stain
epicanthus (epicanthal, adj.)
a vertical fold on either side of the nose; a normal characteristic in persons of certain races, but absent in others.
epidemiology
the study of the relationships of various factors determining the frequency and distribution of diseases in the human community; also the field of medicine dealing with the determination of specific causes of localized outbreaks of infection, poisoning or other disease of recognized aetiology.
epigastrium
the upper and middle region of the abdomen, located within the sternal angle. epigastric is the adjective.
erythema
diffuse or patchy redness of skin, blanching on pressure, due to congestion of cutaneous capillaries
erythrocyte(s)
red blood cell(s).
aetiology - (etiologic, etiological = adj.)
the science dealing with the causes of disease.
excise
to cut out
excision
the act of cutting out.
exogenous
originating from outside of the body.
exudate
a fluid with a high concentration of protein and cellular debris which has escaped from blood vessels and has been deposited in tissues, or on tissue surfaces, usually as a result of inflammation.
facies
the face; or the expression or appearance of the face.
fibrillation
a small, local, involuntary muscular contraction, due to spontaneous activation of single muscle cells or muscle fibres whose nerve supply has been damaged or cut off