Symptom Information: Sort according to HPO 

1
(HPO:0003467) Atlantoaxial instability 6 / 7739
2
(HPO:0008462) Cervical instability 4 / 7739
3
(HPO:0003311) Hypoplasia of the odontoid process 34 / 7739
4
(OMIM) Dystopic os odontoideum 1 / 7739
5
(OMIM) Excessive rotation of the axis (C2) 1 / 7739
6
(OMIM) Craniocervical instability 1 / 7739
7
(OMIM) Secondary spinal cord compression may occur 1 / 7739
8
(HPO:0000006) Autosomal dominant inheritance 2518 / 7739
9
(HPO:0040143) Dystopic os odontoideum 1 / 7739