| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| gehele wervel C2 | Is a | False | Bone structure of axis (body structure) | Inferred relationship | Some |  | 
| Entire body of axis (body structure) | Is a | False | Bone structure of axis (body structure) | Inferred relationship | Some |  | 
| Lamina of axis | Is a | False | Bone structure of axis (body structure) | Inferred relationship | Some |  | 
| Dorsal arch of axis | Is a | True | Bone structure of axis (body structure) | Inferred relationship | Some |  | 
| Structure of pedicle of axis (body structure) | Is a | False | Bone structure of axis (body structure) | Inferred relationship | Some |  | 
| Articular facet of axis | Is a | False | Bone structure of axis (body structure) | Inferred relationship | Some |  | 
| Process of axis | Is a | True | Bone structure of axis (body structure) | Inferred relationship | Some |  | 
| Foramen of axis | Is a | True | Bone structure of axis (body structure) | Inferred relationship | Some |  | 
| Structure of articular process of axis | Is a | False | Bone structure of axis (body structure) | Inferred relationship | Some |  | 
| Closed fracture axis, posterior arch | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 2 | 
| Closed fracture axis, tricolumnar | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Open fracture axis, tricolumnar | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Closed fracture axis (disorder) | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Open fracture axis | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Spinal fusion of atlas-axis for pseudoarthrosis | Procedure site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| gesloten fractuur van tweede cervicale wervel zonder dwarslaesie (aandoening) | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Arthrodesis by posterior technique of atlas-axis with internal fixation | Procedure site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 3 | 
| gecompliceerde fractuur van tweede cervicale wervel zonder dwarslaesie (aandoening) | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Spinal fusion of atlas-axis (procedure) | Procedure site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 2 | 
| Open dislocation of second cervical vertebra | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some |  | 
| Closed traumatic dislocation of second cervical vertebra (disorder) | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Arthrodesis by posterior technique of atlas-axis with bone graft | Procedure site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Fracture of second cervical vertebra | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Closed fracture of axis without spinal cord lesion | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| gecompliceerde fractuur van tweede cervicale wervel zonder dwarslaesie (aandoening) | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Closed fracture axis, transverse process | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 2 | 
| Closed fracture axis, spondylolysis | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Open fracture axis, spondylolysis | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Arthrodesis by posterior technique of atlas-axis with bone graft | Procedure site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 2 | 
| Arthrodesis by posterior technique of atlas-axis with bone graft | Procedure site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 2 | 
| Arthrodesis by anterior transoral technique, clivus-C1-C2, with bone graft and excision of odontoid process | Procedure site - Indirect (attribute) | False | Bone structure of axis (body structure) | Inferred relationship | Some | 2 | 
| Arthrodesis by anterior extraoral technique, clivus-C1-C2, with bone graft and excision of odontoid process | Procedure site - Indirect (attribute) | False | Bone structure of axis (body structure) | Inferred relationship | Some | 2 | 
| Arthrodesis by posterior technique of atlas-axis with bone graft | Procedure site - Indirect (attribute) | False | Bone structure of axis (body structure) | Inferred relationship | Some | 2 | 
| Structure of body of axis (body structure) | Is a | True | Bone structure of axis (body structure) | Inferred relationship | Some |  | 
| Transoral fusion of atlantoaxial joint | Procedure site - Direct (attribute) | False | Bone structure of axis (body structure) | Inferred relationship | Some | 3 | 
| Posterior fusion of atlantoaxial joint | Procedure site - Direct (attribute) | False | Bone structure of axis (body structure) | Inferred relationship | Some | 3 | 
| Spinal fusion of atlas-axis for pseudoarthrosis | Procedure site - Direct (attribute) | False | Bone structure of axis (body structure) | Inferred relationship | Some | 2 | 
| Arthrodesis by posterior technique of atlas-axis with internal fixation | Procedure site - Direct (attribute) | False | Bone structure of axis (body structure) | Inferred relationship | Some | 2 | 
| Spinal fusion of atlas-axis (procedure) | Procedure site - Direct (attribute) | False | Bone structure of axis (body structure) | Inferred relationship | Some | 2 | 
| Arthrodesis by posterior technique of atlas-axis with bone graft | Procedure site - Direct (attribute) | False | Bone structure of axis (body structure) | Inferred relationship | Some | 2 | 
| Fusion of atlantoaxial joint NEC | Procedure site - Direct (attribute) | False | Bone structure of axis (body structure) | Inferred relationship | Some | 2 | 
| Open fracture axis, spondylolysis | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Fracture of second cervical vertebra | Finding site | True | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Closed fracture axis, tricolumnar | Finding site | True | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Open fracture axis, tricolumnar | Finding site | True | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| gecompliceerde fractuur van tweede cervicale wervel zonder dwarslaesie (aandoening) | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| gesloten fractuur van tweede cervicale wervel zonder dwarslaesie (aandoening) | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Open fracture axis | Finding site | True | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Closed fracture axis, spondylolysis | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Closed fracture of axis without spinal cord lesion | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| gecompliceerde fractuur van tweede cervicale wervel zonder dwarslaesie (aandoening) | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Closed fracture axis (disorder) | Finding site | True | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Entire bone of axis (body structure) | Is a | True | Bone structure of axis (body structure) | Inferred relationship | Some |  | 
| Hangman fracture | Finding site | True | Bone structure of axis (body structure) | Inferred relationship | Some | 5 | 
| fractuur van axiale wervel | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| fractuur van axis zonder dwarslaesie (aandoening) | Finding site | False | Bone structure of axis (body structure) | Inferred relationship | Some | 1 | 
| Fracture of axis with neurological abnormality (disorder) | Finding site | True | Bone structure of axis (body structure) | Inferred relationship | Some | 3 | 
| Tricolumnar fracture of axis (disorder) | Finding site | True | Bone structure of axis (body structure) | Inferred relationship | Some | 1 |