Primary basilar impression

Common Name(s)

Primary basilar impression, Basilar Impression Primary

Primary basilar impression of the skull is a developmental defect of the cranium in which there is invagination of the foramen magnum upward into the posterior cranial fossa. Basilar impression is often associated with other malformations of the notochord and craniovertebral junction, such as occipitalization of the atlas, Klippel-Feil anomaly (see {118100}), Chiari type I malformation ({118420}), and syringomyelia ({186700}) ({9:Paradis and Sax, 1972}; {1:Bhangoo and Crockard, 1999}). Secondary basilar impression occurs as a result of generalized skeletal diseases, including hyperparathyroidism (see {145000}), Paget disease (see {167250}), and osteogenesis imperfecta (see, e.g., {166200}). Platybasia refers to a skull base with an abnormally obtuse angle between the planes of the clivus and the anterior fossa. Platybasia may occur in basilar impression, but it is not of medical significance on its own ({1:Bhangoo and Crockard, 1999}). Historically, basilar impression was defined radiologically by numerous parameters, including the lines defined by {4:Chamberlain (1939)}, {7:McGregor (1948)}, and {5:Fischgold and Metzger (1952)}, and the angle defined by {3:Bull et al. (1955)}.
 

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Condition Specific Organizations

Following organizations serve the condition "Primary basilar impression" for support, advocacy or research.

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Scientific Literature

Articles from the PubMed Database

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The terms "Primary basilar impression" returned 1 free, full-text research articles on human participants. First 3 results:

Birth injury: a possible contributory factor in the aetiology of primary basilar impression.
 

Author(s): R De Battersby, B Williams

Journal: J. Neurol. Neurosurg. Psychiatry. 1982 Oct;45(10):879-83.

 

Adult patients with primary basilar impression were four times more likely to have a history of birth injury than a control group. Distortion of basicranial synchondroses during birth is suggested as a possible mechanism and, in association with hindbrain herniation and arachnoid ...

Last Updated: 27 Jan 1983

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The terms "Primary basilar impression" returned 0 free, full-text review articles on human participants.

 
 
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