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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

a·gen·e·sis

(ā-jen'ĕ-sis),
Absence or failure to form of any part.
[G. a- priv. + genesis, production]
Farlex Partner Medical Dictionary © Farlex 2012

agenesis

(ā-jĕn′ĭ-sĭs)
n.
Absence or incomplete development of an organ or body part.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

Agenesis

The incomplete or complete nondevelopment of a body part, organ or tissue.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

agenesis

Embryology The incomplete or nondevelopment of a body part, organ or tissue. See Anal agenesis, Renal agenesis.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

a·gen·e·sis

(ā-jen'ĕ-sis)
Absence or failure of formation of any part.
[G. a- priv. + genesis, production]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

a·gen·e·sis

(ā-jen'ĕ-sis)
Absence or failure to form of any part.
[G. a- priv. + genesis, production]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
The mutations of MSX1 gene causes tooth agenesis, tooth malformations including conical shaped tooth and impactions at the same time it may also play its role in associated syndromes like Witkop syndrome, cleft lip and cleft palate and Wolf-Hirschhorn syndrome.
The simplest way to differentiate imperforate hymen from agenesis of the lower vagina is with visualization of the obstructing tissue on exam and usage of transperitoneal ultrasound.
In conclusion, this is the first report of sectoral ciliary body agenesis complicated by cataract in the English literature.
Appearance of an interhemispheric cyst associated with agenesis of the corpus callosum.
Complete dissection of the entire biliary system along with exploration of the possible ectopic sites of gallbladder was in the past mandatory to conclusively diagnose agenesis.[1,2,3,4] In our initial five patients, conversion to laparotomy was needed for complete exploration.
Therefore, the purpose of this study was to investigate the frequency of dental anomalies like agenesis, impacted teeth, supernumerary teeth and ectopic eruption and determine their association with different types of malocclusion.
Although the incidence of thyroid isthmus agenesis has been reported to range between 0.5% and 10%, the precise incidence rate is unknown (4, 5).
The life expectancy of a child with unilateral renal agenesis is normal.
Early high-level obstruction of the pelviureteric junction leading to agenesis of the ipsilateral kidney, often results in defects in the Mullerian duct at the same level.
Agenesis is defined as a numerical anomaly that expresses the lack of development of one or more teeth, occurring in approximately 25% of the population, and can affect deciduous and permanent dentitions resulting from a dental blade disorder which prevents the formation of the dental germ.
The analysis of the bony structures revealed a fusion of the last two sacral vertebrae with coccygeal agenesis and pubic diastasis and partial agenesis of the distal half of the left tibia with an equinovarus distortion of the foot (Figure 4).