hypoplasia

[‚hī·pō′plā·zhə]

(medicine)

Failure of a tissue or organ to achieve complete development.

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 It might be outdated or ideologically biased.

Hypoplasia

or hypogenesis, underdevelopment of a tissue, organ, part of the body, or entire organism. Just as with aplasia, the basis of hypoplasia is impairment of the interuterine development of the fetus as a result of the effect of radiant energy on the mother’s organism, imbalance in nutrition, and certain infections transmitted from the mother to the fetus, such as German measles, toxoplasmosis, or poliomyelitis.

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References in periodicals archive

Congenital Heart Diseases Product Types In-Depth: Hypoplasia, Obstructive & Septal Defects

Most Strategic Ways To Accelerate Congenital Heart Diseases Market / Pfizer, Abbott Laboratories, Eli Lilly

Biallelic inactivation of the LHCGR causes Leydig cell hypoplasia (LCH, OMIM#238320) that leads to male disorders of sexual differentiation (DSD).

Novel Compound Heterozygous Variants in the LHCGR Gene in a Genetically Male Patient with Female External Genitalia

Although rare but when dealing with triad of recurrent pneumonia, right lung hypoplasia and mediastinal shift, physicians should consider possibility of Scimitar syndrome.

Scimitar syndrome: A rare case of recurrent pneumonia

Finger and phalangeal abnormalities (clinodactyly, bipartite phalanges and phalangeal hypoplasia) were noticed in four cases.

SPONDYLOEPIPHYSEAL DYSPLASIA CONGENITA: REPORT OF A CASE AND REVIEW OF THE LITERATURE

Adrenal hypoplasia congenita is a rare disorder that can be inherited as an X-linked or autosomal recessive pattern.

Adrenal hypoplasia congenita in identical twins

The largest difference was observed in patients with albinism (-0.76 logMAR) and the least difference was observed in those with OD hypoplasia (-0.14 logMAR).

Evaluation of Efficacy of Low Vision Aiding Devices in Pediatric Cases

The comparative percentage for occurrence of enamel hypoplasia in giraffids of these Siwalik deposits is early Miocene-early middle Miocene (29%), middle Miocene (20%), late Miocene-early Pliocene (15%), early Pliocene-late Pliocene (26%) and late Pliocene-early Pleistocene (10%).

Enamel Hypoplasia Analysis in Giraffids to Compare Stress Episodes in Geological History of the Siwaliks of Pakistan

Moreover, patients were asked about recurrent aphthous stomatitis and examined to detect temporomandibular disorders according to the Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) for Clinical and Research Applications and defects of the enamel surface of the teeth (e.g., enamel wear disorder and/or enamel hypoplasia) [23].

Prevalence of Sleep Bruxism in IBD Patients and Its Correlation to Other Dental Disorders and Quality of Life

Funduscopic examination revealed bilateral foveal hypoplasia and optic nerve hypoplasia.

Phenotypic Variation in a Four-Generation Family with Aniridia Carrying a Novel PAX6 Mutation

Turner's hypoplasia is a type of hypoplasia characterized by imperfections in a permanent tooth caused by trauma or periapical infections of deciduous teeth and commonly irritate patients aesthetically.

Minimally Invasive Approach for Improving Anterior Dental Aesthetics: Case Report with 1-Year Follow-Up

However, the term foveal hypoplasia has also been used to describe cases with expected acuity of 0.44 logMAR, absent extrusion of plexiform layers, absence of foveal pit, presence of outer segment lengthening, and presence of ONL widening [7].

Absent Foveal Pit, Also Known as Fovea Plana, in a Child without Associated Ocular or Systemic Findings

A 5-year-old boy was consulted at the age of 7 months for hypoplasia of his right thumb and active movement disorder.

A Case of a 5-Year-Old Boy with a Blauth Type IIIB Hypoplastic Thumb Reconstructed with a Nonvascularized, Hemilongitudinal Metatarsal Transfer