From Wikipedia, the free encyclopedia
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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