hypertrophy

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hypertrophy

(hīpûr`trəfē), enlargement of a tissue or organ of the body resulting from an increase in the size of its cells. Such growth accompanies an increase in the functioning of the tissue. In normal physiology the growth in size of muscles (e.g., in an athlete as a result of increased exercise) and also the enlargement of a uterus in pregnancy are caused by hypertrophy of muscle cells. In pathology the thickening of the heart muscle from overstrain, as in hypertensionhypertension
or high blood pressure,
elevated blood pressure resulting from an increase in the amount of blood pumped by the heart or from increased resistance to the flow of blood through the small arterial blood vessels (arterioles).
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 (high blood pressure), is the result of hypertrophy. An organ subjected to extra work (e.g., the one kidney left to function after surgical removal of the other) usually compensates by enlarging; in such cases hyperplasia, an increase in the number of cells, generally accompanies hypertrophy.

Hypertrophy

 

an increase in the volume of a body organ or of any of its parts.

Hypertrophy in man (or in animals) may occur either as the result of the enlargement of the individual component elements of an organ (cells and tissues) or as the result of an increase in their quantity (hyperplasia). True hypertrophy and false hypertrophy are distinguished. The former includes enlargement in volume or mass of specific elements as the result of an increased functional load (so-called functional, or compensatory, hypertrophy) or disruption of the regulatory influences of the nervous and endocrine systems. Functional hypertrophy may appear in healthy persons who are occupied with physical labor, such as in athletes (“physiologic hypertrophy” of the muscles). It may also appear upon affection of a part of any organ, such as after heart failure (compensatory hypertrophy) or after the destruction of a paired organ, such as a kidney (vicarious hypertrophy). Compensation for the impaired functions occurs in all instances of functional hypertrophy. Examples of hypertrophy occurring as a result of the disruption of neuroendocrine influences include acromegaly and gynecomastia; in these cases the hypertrophy has no compensatory significance but is accompanied by considerable disturbances of function. False hypertrophy refers to enlargement of the organ as the result of excessive growth of the interstitial, most often the adipose, tissue in response to atrophy of the parenchyma (the functional tissue). Function of the organ in such cases is usually decreased.

L. L. SHIMKEVICH

Hypertrophy of plant organs is the result of an increase in the size of their cells. The hypertrophy may be the effect of increased synthesis of the substances of the cell membrane or cytoplasm, deposits of reserve compounds, or the development of polynucleosis or polyploidy. The causes of hypertrophy include disruption of the synthesis and metabolism of phenol compounds, amino acids, proteins, carbohydrates, and fats, as well as deficiency of trace elements. The condition may also be caused by viruses, bacteria, fungi, invertebrates, and plant parasites. It may accompany many mutations, grafts, and the effects on the plant of ionizing radiation or ultrasound. Hypertrophy is usually interconnected with hyperplasia and disruptions of tissue differentiation in the organs. In many instances (for example, when there is development of tumors or galls) hypertrophy follows cell division; after mechanical injury and physical or chemical effects, however, it is often primary. Hypertrophy is observed in higher as well as in lower plants.

E. I. SLEPIAN

hypertrophy

[hī′pər·trə·fē]
(pathology)
Increase in cell size causing an increase in the size of an organ or tissue.

hypertrophy

enlargement of an organ or part resulting from an increase in the size of the cells
References in periodicals archive ?
One such disorder is benign prostatic hypertrophy, or enlarged prostate, is a disease of the prostate that manifests with symptoms that include both urinary retention and urinary frequency due to incomplete emptying of the bladder.
Because it is a normal accompaniment of aging in most men, it's called benign prostatic hypertrophy (BPH), and should give no cause for alarm unless urination becomes difficult, too frequent, urinary leakage occurs, or one is forced to remain at the public urinal while several other men come and go in the meantime.
The problem: a swollen prostate gland, or benign prostatic hypertrophy (BPH).
As men get older, the prostate can enlarge, leading to a condition called benign prostatic hypertrophy.
(1) reported an apparent gap between total serum prostate-specific antigen (t-PSA) and the sum of free PSA (f-PSA) plus [[alpha].sub.1]-antichymotrypsin-PSA (ACT-PSA) in patients with prostate carcinoma (PCa) but not in those with benign prostatic hypertrophy (BPH).
Propecia is the same medication as Proscar, which is used for benign prostatic hypertrophy at the five-milligram strength.
The procedure used to be a fixed cost: you were male, you aged, you started getting up 3 or 4 times a night to relieve yourself, and you and your doctor determined a TURP was a fixed cost of your benign prostatic hypertrophy diagnosis.
Benign prostatic hypertrophy (BPH), or the benign enlargement of the prostate gland, affects most males as they age.
For example, a resident with a neurogenic bladder or benign prostatic hypertrophy, has an acceptable diagnosis for using a Foley.
OPK88004, a SARM (Selective Androgen Receptor Modulator) for treating BPH (Benign Prostatic Hypertrophy), urinary incontinence and other conditions is in clinical trials.
The Gleason was negative so Dan had benign prostatic hypertrophy, where the gland enlarges around the urethra as it leaves the bladder.
Clinical evaluation of cernilton in the treatment of the benign prostatic hypertrophy. Hinyokika Kiyo.

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