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Enlarged parietal foramina

Enlarged parietal foramina is an inherited condition of impaired skull development. It is characterised by enlarged openings (foramina) in the parietal bones, which are the two bones that form the top and sides of the skull. This condition is due to incomplete bone formation (ossification) within the parietal bones. The openings are symmetrical and circular in shape, ranging in size from a few millimeters to several centimeters wide. Parietal foramina are a normal feature of fetal development, but typically they close before the baby is born, usually by the fifth month of pregnancy. However, in people with this condition, the parietal foramina remain open throughout life.

Beskrivning

Enlarged parietal foramina is an inherited condition of impaired skull development. It is characterised by enlarged openings (foramina) in the parietal bones, which are the two bones that form the top and sides of the skull. This condition is due to incomplete bone formation (ossification) within the parietal bones. The openings are symmetrical and circular in shape, ranging in size from a few millimeters to several centimeters wide. Parietal foramina are a normal feature of fetal development, but typically they close before the baby is born, usually by the fifth month of pregnancy. However, in people with this condition, the parietal foramina remain open throughout life.

The enlarged parietal foramina are soft to the touch due to the lack of bone at those areas of the skull. People with enlarged parietal foramina usually do not have any related health problems; however, scalp defects, seizures, and structural brain abnormalities have been noted in a small percentage of affected people. Pressure applied to the openings can lead to severe headaches, and individuals with this condition have an increased risk of brain damage or skull fractures if any trauma is experienced in the area of the openings.

There are two forms of enlarged parietal foramina, called type 1 and type 2, which differ in their genetic cause.

Inheritance patterns

The source lists the following possible inheritance patterns: Autosomal dominant. More than one pattern can apply in different cases.

Other names

Catlin marks

Cranium bifidum

Cranium bifidum occultum

Fenestrae parietals symmetricae

Foramina parietalia permagna

FPP

Giant parietal foramina

Hereditary cranium bifidum

Parietal foramina

PFM

Symmetric parietal foramina

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Artikelhistorik

Informationen på denna sida är skriven och granskad av kvalificerade kliniker.
  • 18 aug 2020 | Senaste versionen
  • 1 Mar 2016 | Ursprungligen publicerad

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