Ectopia
9665
174198500
2007-11-27T19:52:08Z
Afasmit
560336
ectopic recombination, ectopic insertions
In [[medicine]] an '''ectopia''' is a displacement or malposition of an [[Organ (anatomy)|organ]] of the body. Most ectopias are [[Congenital disorder|congenital]] but some may happen later in life.
*[[Ectopia lentis]] is the displacement of the crystalline lens of the eye
*[[Ectopia cordis]] is the displacement of the heart outside the body during [[fetus|fetal]] development
*[[Renal ectopia]] occurs when both kidneys occur on the same side of the body
*[[Ectopic pregnancy]] occurs when the fertilized egg implants anywhere other than the uterine wall
*[[Cardiac ectopy]] occurs when [[Electrical conduction system of the heart|electrical signals for a heartbeat]] originate in the wrong part of the [[Myocardium|heart muscle]].
In [[molecular biology]] the term '''ectopic''' is used for at least three purposes:
* [[genetic recombination|ectopic recombination]] refers to recombination between sites, usually containing identical or similar sequences, at different locations in the genome, leading to deletions, insertions, or chromosomal crossovers
* a gene is [[ectopic expression|ectopically expressed]] when it is expressed in an abnormal place.
* in [[transgenic]] experiments, [[ectopic integration]] indicates the insertion of the transgene at a site other than its natural chromosomal locus
[[Category:Diseases]]
[[da:Ektopi]]
[[de:Ektopie]]
[[es:Ectopia]]
[[fr:Ectopie]]
[[it:Ectopia]]
[[pl:Ektopia]]
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