Heterotopia (medicine)

Heterotopia (medicine)

In medicine, "heterotopia" refers to the displacement of an organ or part of an organ from its normal position, often specifically gray matter heterotopia, the displacement of gray matter into the cerebral white matter or ventricles.

Patients with heterotopic grey matter almost always have seizure disorders.

Heterotopia is often divided into three groups: subependymal heterotopia, focal cortical heterotopia and band heterotopia.

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  • Heterotopia — may refer to: * Heterotopia (medicine), the displacement of an organ from its normal position * Heterotopia (space), a concept of other spaces by the philosopher Michel Foucault …   Wikipedia

  • heterotopia — 1. SYN: ectopia. 2. In neuropathology, displacement of gray matter, typically into the deep cerebral white matter. [hetero + G. topos, place] h. maculae SYN: ectopia maculae. * * * (heterotopy) …   Medical dictionary

  • band heterotopia — laminar heterotopia an anomaly of the cerebral cortex in which a heterotopic band of gray matter is found between the lateral ventricles and the cortex; affected patients may have mental retardation or epilepsy. Band heterotopia in a T1 weighted… …   Medical dictionary

  • periventricular nodular heterotopia — a genetically heterogeneous anomaly of the cerebral cortex in which nodular masses of gray matter line the walls of the ventricles and protrude into the lumen. Many persons with this condition develop absence epilepsy around the second decade of… …   Medical dictionary

  • ectopia — Congenital displacement or malposition of any organ or part of the body. SYN: ectopy, heterotopia (1). [G. ektopos, out of place, fr. ektos, outside, + topos, place] e. cloacae SYN: cloacal exstrophy. e. cordis …   Medical dictionary

  • Heterotopic — In the wrong place, in an abnormal place, misplaced. From the Greek roots hetero meaning other + topos meaning place = other place. For example, heterotopic bone formation is the formation of bone where it is not normally found, as in muscle. * * …   Medical dictionary

  • choristoma — A mass formed by maldevelopment of tissue of a type not normally found at that site. [G. choristos, separated, + oma] * * * n. a mass of tissue composed of tissue not normally found at the affected site. A dermoid cyst is an example. * * *… …   Medical dictionary

  • malposition — SYN: dystopia. * * * mal·po·si·tion .mal pə zish ən n wrong or faulty position <fetal malpositions> mal·po·si·tion·ing zish( ə) niŋ n * * * n. (in obstetrics) an abnormal position of the fetal head when this is the presenting part in labour …   Medical dictionary

  • onychoheterotopia — Abnormal placement of nails. * * * on·y·cho·het·ero·to·pia .het ə rō tō pē ə n a condition characterized by abnormal location of the nails * * * on·y·cho·het·ero·to·pia (on″ĭ ko het″ər o toґpe ə) [onycho + heterotopia]… …   Medical dictionary

  • pseudoheterotopia — A seeming displacement of certain tissues observed postmortem; actually an artifact, rather than a true heterotopia. * * * pseu·do·het·ero·to·pia (soo″do het″ər o toґpe ə) displacement of gray or white matter of the brain or …   Medical dictionary

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