agenesis


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Related to agenesis: dysgenesis

agenesis

 [a-jen´ĕ-sis]
absence of an organ due to nonappearance of its primordium in the embryo.

a·gen·e·sis

(ā-jen'ĕ-sis),
Absence or failure to form of any part.
[G. a- priv. + genesis, production]

agenesis

/agen·e·sis/ (a-jen´ĕ-sis) absence of an organ, particularly that due to nonappearance of its primordium in the embryo.
gonadal agenesis  complete failure of gonadal development, as in Turner's syndrome.
nuclear agenesis  Möbius' syndrome.

agenesis

(ā-jĕn′ĭ-sĭs)
n.
Absence or incomplete development of an organ or body part.

agenesis

[ājen′əsis]
Etymology: Gk, a + genein, not to produce
1 a congenital absence of an organ or part, usually caused by a lack of primordial tissue and failure of development in the embryo.
2 impotence or sterility. Also called agenesia. Compare dysgenesis. agenic, adj.
enlarge picture
Agenesis of the corpus callosum

Agenesis

The incomplete or complete nondevelopment of a body part, organ or tissue.

agenesis

Embryology The incomplete or nondevelopment of a body part, organ or tissue. See Anal agenesis, Renal agenesis.

a·gen·e·sis

(ā-jen'ĕ-sis)
Absence or failure of formation of any part.
[G. a- priv. + genesis, production]

agenesis

Absence of an organ or part as a result of failure of development in the early stages. The drug THALIDOMIDE caused agenesis of the limbs.

a·gen·e·sis

(ā-jen'ĕ-sis)
Absence or failure to form of any part.
[G. a- priv. + genesis, production]

agenesis (ājen´əsis),

n the defective development or congenital absence of parts.

agenesis

absence of an organ due to nonappearance of its primordium in the embryo.
References in periodicals archive ?
Agenesis of the corpus callosum: A comparison of prenatal ultrasound and magnetic resonance imaging.
Agenesis of the paranasal sinuses is an uncommon anatomic variation; it mainly appears in the frontal sinuses (12% of individuals) and next most often in the maxillary sinuses (5 to 6%).
The prevalence of agenesis of the Palmaris longus has been well studied following the first report in 1559 by Colombos in De Re anatomicaLibrib (12,13).
Msx1 and Pax9 alleles are over-transmitted together suggesting both genes interact in tooth agenesis [Vieira et al.
Spencer, 31, had both legs amputated at the age of five after being born with genetic disorder, sacral agenesis.
Dynamic MRI in the congenital agenesis of the neural pituitary stalk syndrome: the role of the vascular pituitary stalk in predicting residual anterior pituitary function.
John Young, 32, who can't walk due to a spinal condition called lumbosacral agenesis, was told he couldn't board a bus in Holyhead.
Congenital unilateral pulmonary artery agenesis and aspergilloma.
Agenesis is most common, but malrotation, horseshoe kidney, or ectopic kidney may be present (Moore, 1975).
In this classification, class I consist of hypoplasia and agenesis of the uterus.