Malformations of the cranio-cervical junction: basilar impression

A pictorial essay: Congenital malformations of the cranio- cervical junction

Transoral Surgery for Cranio-cervical Junction Compression

Basilar impression

Basilar impression is a skeletal malformation characterized by translocation of the upper cervical spine and clivus into the foramen magnum, giving rise to various symptoms related to brainstem, upper spinal cord, and cerebellar compression. It is generally classified as primary (familial), in which the defect is unaccompanied by intrinsic abnormalities of bone, or as secondary, reflecting an i...

Basilar Impression of the Skull.

THE anatomical features of basilar impression of the skull have long been known; its recognition during the lifetime of the patient is extremely difficult on clinical grounds alone, and must be based on accurate radiological examination. In the case to be described in the present paper, planigraphic radiography by the method of Dr. Ziedses Des Plantes (1932) clarified the anatomical details and...

Basilar Impression (Platybasia)

Basilar impression, sometimes spoken of as platybasia, is a deformity of the occipital bone and upper end of the cervical spine resulting from anomalous development. It may produce marked pressure effects upon the medulla and adjacent parts of the central nervous system. These pressure effects may simulate syringomyelia, disseminated sclerosis, or progressive spastic paralysis so closely as to ...