hypoplasia


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Related to hypoplasia: Optic nerve hypoplasia, enamel hypoplasia, Cerebellar hypoplasia

hypoplasia

 [hi″po-pla´zhah]
incomplete development or underdevelopment of an organ or tissue. adj., adj hypoplas´tic.
focal dermal hypoplasia a hereditary disorder found exclusively in females, transmitted as an X-linked dominant trait, characterized typically by linear areas of hypoplasia of the skin with herniation of underlying tissue through the defects; telangiectasias; linear or reticular areas of skin discoloration; localized superficial fatty deposits in the skin; papillomas of mucous membranes or skin around various orifices; and anomalies of the extremities, including webbed fingers and toes and absence of some or all of the digits (oligodactyly or adactyly). There may also be other defects affecting the eyes, teeth, or other body systems. Called also Goltz syndrome.

hy·po·pla·si·a

(hī'pō-plā'zē-ă),
1. Underdevelopment of a tissue or organ, usually due to a deficiency in the number of cells.
2. Atrophy due to destruction of some of the elements and not merely to their general reduction in size.
[hypo- + G. plasis, a molding]

hypoplasia

/hy·po·pla·sia/ (-pla´zhah) incomplete development or underdevelopment of an organ or tissue.hypoplas´tic
enamel hypoplasia  incomplete or defective development of the enamel of the teeth; it may be hereditary or acquired.
oligomeganephronic renal hypoplasia  oligomeganephronia.

hypoplasia

(hī′pō-plā′zhə)
n.
Incomplete or arrested development of an organ or a part.

hy′po·plas′tic (-plăs′tĭk) adj.

hypoplasia

[hī′pōplā′zhə]
Etymology: Gk, hypo + plassein, to mold
underdevelopment of an organ or a tissue, usually resulting from the presence of a smaller-than-normal number of cells. Kinds of hypoplasia are cartilage-hair hypoplasia and enamel hypoplasia. Also called hypoplasty. Compare aplasia, hyperplasia. See also oligomeganephronia, osteogenesis imperfecta. hypoplastic, adj.

hypoplasia

The underdevelopment, incomplete development or atrophy of a tissue or organ.

hy·po·pla·si·a

(hī'pō-plā'zē-ă)
1. Underdevelopment of a tissue or organ, usually due to a decrease in the number of cells.
2. Atrophy due to destruction of some of the elements of a tissue or organ, and not merely to their general reduction in size.
Compare: hyperplasia
[hypo- + G. plasis, a molding]

hypoplasia

Underdevelopment of a tissue or organ as a result of a failure of production of a sufficient number of cells. Compare HYPERPLASIA.

hypoplasia

deficiency in growth.

Hypoplasia

A deficiency or underdevelopment of a tissue or body structure.

hypoplasia

underdevelopment/atrophy due to decreased cell numbers or destruction of tissue elements

hypoplasia

Any condition in which there is an underdevelopment, or a decrease in the number of cells, of an organ or tissue. Example: optic nerve hypoplasia in which there is a reduction of axons, which, in severe cases, leads to visual impairment. See hyperplasia.

hy·po·pla·si·a

(hī'pō-plā'zē-ă)
1. Underdevelopment of a tissue or organ, usually due to a deficiency in the number of cells.
2. Atrophy due to destruction of some of the elements and not merely to their general reduction in size.
[hypo- + G. plasis, a molding]

hypoplasia (hī´pōplā´zhə),

n the defective or incomplete development of a tissue or structure.
Enlarge picture
Hypoplasia.
hypoplasia, enamel, chronologic,
n a prenatal or postnatal systemic type affecting amelogenesis occurring at the time of the systemic disorder.
hypoplasia, enamel, hereditary (hereditary brown tooth),
n a hereditary anomaly of the enamel affecting the primary and permanent dentition in which a thin layer of hard enamel covering the yellow dentin gives the tooth a brown appearance.
hypoplasia, mandibular,
n an abnormally small mandibular development (e.g., in micrognathia or brachygnathia).

hypoplasia, hypoplasty

incomplete development or underdevelopment of an organ or tissue, e.g. cerebellar hypoplasia, bone marrow hypoplasia, gonadal hypoplasia, small intestinal mucosal hypoplasia.
References in periodicals archive ?
Selected Examples of Genes in Which Mutations can Result in Various Congenital Abnormalities of the Kidney and Urinary Tract (CAKUT) Lesions CAKUT PAX2 TCF2 EYA1 SIX1 SALL1 Dysplasia X XX XX Agenesis X X Hypoplasia X X X UPJ obst X X X VU reflux X GCKD X Syndrome Renal-coloboma MODY5 BOR BOR Townes-Brock CAKUT GATA3 Dysplasia X Agenesis X Hypoplasia UPJ obst VU reflux X GCKD Syndrome HDR Abbreviations: BOR, branchial-oto-renal syndrome; GCKD, glomerulocystic kidney disease; HDR, hypoparathyroidism, deafness and renal dyspla- sia; MODY, maturity onset diabetes type 5; UPJ obst, ureteropelvic junction obstruction; VU, vesicoureteral.
CUTLINE: (1) Tipsy the cat, who has cerebellar hypoplasia, waits for his new owners to take him home.
While the exact mechanism of action of how fluoride causes enamel mottling remains unknown, it is well-recognized that with increased amounts of fluoride concentrations in the drinking water, the resultant enamel hypoplasia becomes progressively evident, as increased fluoride levels interfere with ameloblastic function, which adversely affects both enamel matrix formation and enamel matrix calcification.
Chronic neutropenia and abnormal cellular immunity in cartilage-hair hypoplasia.
A chest X-ray (Figure 1A) and high resolution computed tomography (HRCT) scan of the chest and abdomen noted a tubular thoracic cage, some basal atelectasis, no pulmonary hypoplasia and a large omphalocele which contained much of the liver.
An unusual member of the nuclear hormone receptor super-family responsible for X-linked adrenal hypoplasia congenita.
Oral examination revealed smooth enamel hypoplasia, a skeletal open occlusal relationship, a dental midline discrepancy, short clinical crowns, occlusal wear, and aesthetic disharmonies (Figure 1).
Bone marrow studies: Hypocellular marrow with myeloid hypoplasia with no phenotypic evidence of abnormal lymphoid or blast population.
2003) Abnormal looping 2 0 Aortic hypoplasia 1 0 Pulmonary artery hypoplasia 1 0 Atrial septal defect 4 7 Ventricular septal defects Perimembranous (subaortic) 3 3 Muscular 1 1 Atrioventricular septal defect 0 1 Aortic valve defect 0 2 9 11 181 105 (a) Data from Dawson et al.
The association of optic-nerve hypoplasia with absence of the corpus callosum and septum pellucidum combined with pituitary hormone deficiency is known as Septo-Optic Dysplasia (SOD), or the Syndrome of de Morsier.
Breakthrough to relieve patients with mild Mid-facial Hypoplasia
Five-year-old Daisy suffers from Cerebellar Hypoplasia, which means the part of her brain that controls her movement and spatial awareness did not fully develop at birth.