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In medicine an ectopia is a displacement or malposition of an organ of the body. Most ectopias are 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 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 signals for a heartbeat originate in the wrong part of the heart muscle.
In molecular biology the term ectopic is used for at least three purposes:
- 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 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
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- This page was last modified on 27 November 2007, at 19:52.
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