Platybasia
Encyclopedia
Platybasia is a spinal disease of a malformed relationship between the occipital bone
Occipital bone
The occipital bone, a saucer-shaped membrane bone situated at the back and lower part of the cranium, is trapezoidal in shape and curved on itself...

 and cervical spine.
It may be caused by Paget's disease
Paget's disease
Sir James Paget, a surgeon and pathologist, described several diseases, including:* Paget's disease of bone * Paget's disease of the breast* Paget-Schroetter disease* Extramammary Paget's disease...

.
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