ICD-11 classes
20 Developmental anomalies
Structural developmental anomalies primarily affecting one...
Structural developmental anomalies of the skeleton
LB73 — Structural developmental anomalies of spine or bony thorax
LB73.2 — Structural developmental anomalies of spine
LB73.21 — Occipitalisation of atlas
ICD-11 LB73.21 — Occipitalisation of atlas
A condition caused by failure of the atlas and occiput to correctly develop during the antenatal period. This condition is characterised by fusion of the atlas to the base of the occiput. This condition may present with headache, suboccipital stiffness, restricted motion, or dizziness. Confirmation is through observation of the fusion by imaging.
The diagnosis includes nothing.
The diagnosis excludes nothing.
It has no clarifying diagnoses.
The diagnosis is coded elsewhere: