hyperplasia

[‚hī·pər′plā·zhə]

(medicine)

Increase in cell number causing an increase in the size of a tissue or organ.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Hyperplasia

an increase in the number of structural elements of tissues or organs. In man and animals, hyperplasia is based on the intensified reproduction of cells and the formation of new structures. Hyperplasia is observed in various types of pathological growth of tissues (chronic productive inflammation and tumor), in regeneration, and in hypertrophy. Hyperplasia often carries with it compensating characters. In plants, it may be a local growth of tissues resulting from mitotic or amitotic cell division. It occurs with infection by destructive or pathogenic organisms, during trauma, and under the influence of growth stimulants, pesticides, and other preparations. The result of hyperplasia is the formation of galls, calluses, and warts.

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References in periodicals archive

Congenital adrenal hyperplasia: female pseudohermaphroditism and virilization.

Female pseudohermaphroditism: Congenital adrenal hyperplasia presenting with diffuse hyperpigmentation

Papillary endothelial hyperplasia (Masson's tumor) in children.

Masson's Hemangioma of the Urethra: A Case Report

CT with three-dimensional reconstruction is essential to differentiate coronoid process hyperplasia from other conditions, such as ankylosis, neoplastic coronoid (chondroma or osteochondroma), traumas, and thickened, but not elongated, coronoid processes.

Mandibular coronoid process hyperplasia: a case report

Keywords: Postmenopausal Bleeding, Endometrial Hyperplasia, Adenocarcinoma.

MORPHOLOGICAL PATTERN OF ENDOMETRIAL LESIONS IN POSTMENOPAUSAL BLEEDING

Above 90% of myasthenia gravis cases had abnormal thymus including 70% thymic lymphoid hyperplasia and 20% thymoma [4].

A Thymic Hyperplasia Case without Suppressing on Chemical Shift Magnetic Resonance Imaging

Final pathology revealed inactive endometrium with no hyperplasia or atypia (Figure 6).

Oncogenic Potential and Clinical Implications of Giant Endometrial Polyps: A Case Report and Literature Review

First reported by Snover et al., reactive lymphoid hyperplasia has been reported in many organs in the body and rarely in the liver [6, 7].

Intrahepatic Reactive Lymphoid Hyperplasia: A Case Report and Review of the Literature

Various enzyme deficiencies are responsible for congenital adrenal hyperplasia (CAH) with 21-hydroxy-lase deficiency being the most frequent culprit.

Congenital adrenal hyperplasia secondary to 3-beta hydroxysteroid dehydrogenase deficiency

Endometrial hyperplasia and polyps are the most common patterns seen in the age group of 35 years.

Evaluation of endometrial histopathological patterns in abnormal uterine bleeding: A study of 1545 cases

Pseudoangiomatous stromal hyperplasia (PASH) is a benign proliferative lesion of the breast stroma which was first described by Vuitch et al in 1986 (1).

PSEUDOANGIOMATOUS STROMAL HYPERPLASIA (PASH) OF THE BREAST IN AN ADOLESCENT: A CASE REPORT AND LITERATURE REVIEW/ADOLESAN KIZ COCUGUNDA PSODOANJIYOMATOZ STROMAL HIPERPLAZI: OLGU SUNUMU VE LITERATUR DERLEMESI

Fibroadenomatoid hyperplasia may occur as a localized or diffuse lesion; it is observed in approximately 5-7% of all benign surgical biopsy samples from Japanese and American women (HANSON et al., 1987).

Mammary fibroadenomatoid hyperplasia in a heifer/Hiperplasia fibroadenomatoide mamaria em uma novilha