Terminology Service for NFDI4Health
Platybasia
Go to external page
http://purl.obolibrary.org/obo/HP_0002691
A developmental malformation of the occipital bone and upper end of the cervical spine, in which the latter appears to have pushed the floor of the occipital bone upward such that there is an abnormal flattening of the skull base. [ ]
Term info
Label
Platybasia
Synonyms
- Increased basal angle of skull base
- Obtuse basal angle of skull base
Subsets
hposlim_core
comment
Platybasia is malformation of the base of the skull due to softening of skull bones or a developmental anomaly, with bulging upwards of the floor of the posterior cranial fossa, upward displacement of the upper cervical vertebrae, and bony impingement on the brainstem. It results in abnormal obtuseness of the basal angle that can be demonstrated radiographically. If platybasia is associated with basilar invagination, compression of the brainstem and upper cervical cord can result. Basal Angle formed by: line joining the nasion with the centre of the pituitary fossa line joining the anterior border of the foramen magnum with the centre of the pituitary fossa normal: 125 degrees-143 degrees platybasia: > 143 degrees basilar kyphosis: < 125 degrees
has broad synonym
Flattening of the skull base
has obo namespace
human_phenotype
id
HP:0002691