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]] {{disease-stub}}