| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Entire upper cervical spinal cord | Is a | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier |  | 
| Open fracture of C1-C4 level with incomplete spinal cord lesion | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Injury at C1-C4 level with complete lesion of spinal cord AND without bone injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Anterior cord syndrome co-occurrent and due to open fracture of C1-C4 level | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Injury at C1-C4 level with spinal cord injury AND without bone injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture of C1-C4 level with posterior cord syndrome | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture of C1-C4 level with complete lesion of cord | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture of C1-C4 level with central cord syndrome | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture of C1-C4 level with posterior cord syndrome | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Anterior cord syndrome co-occurrent and due to closed fracture of C1-C4 level | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture of C1-C4 level with central cord syndrome | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Injury at C1-C4 level with central cord syndrome AND without bone injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Injury at C1-C4 level with posterior cord syndrome AND without bone injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Injury at C1-C4 level with anterior cord syndrome AND without bone injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture of C1-C4 level with spinal cord injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture of C1-C4 level with complete lesion of cord | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture of C1-C4 level with incomplete cord lesion | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture of C1-C4 level with spinal cord injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Incomplete spinal cord lesion at C1-C4 level without bone injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture of C1-C4 level with posterior cord syndrome | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Anterior cord syndrome co-occurrent and due to open fracture of C1-C4 level | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Injury at C1-C4 level with posterior cord syndrome AND without bone injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture of C1-C4 level with complete lesion of cord | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Injury at C1-C4 level with central cord syndrome AND without bone injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture of C1-C4 level with incomplete cord lesion | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture of C1-C4 level with central cord syndrome | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Injury at C1-C4 level with complete lesion of spinal cord AND without bone injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Incomplete spinal cord lesion at C1-C4 level without bone injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture of C1-C4 level with spinal cord injury | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture of C1-C4 level with posterior cord syndrome | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture of C1-C4 level with complete lesion of cord | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Injury at C1-C4 level with spinal cord injury AND without bone injury | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Injury at C1-C4 level with anterior cord syndrome AND without bone injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Injury at C1-C4 level with central cord syndrome AND without bone injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Open spinal fracture with complete cervical cord lesion, C1-4 | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Closed spinal fracture with central cervical cord lesion, C1-4 | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Closed spinal fracture with complete cervical cord lesion, C1-4 | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Closed fracture of C1-C4 level with central cord syndrome | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Open spinal fracture with posterior cervical cord lesion, C1-4 | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Open spinal fracture with central cervical cord lesion, C1-4 | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Anterior cord syndrome co-occurrent and due to closed fracture of C1-C4 level | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Open fracture of C1-C4 level with incomplete spinal cord lesion | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture of C1-C4 level with posterior cord syndrome | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Closed fracture of C1-C4 level with spinal cord injury | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Closed spinal fracture with anterior cervical cord lesion, C1-4 | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Closed spinal fracture with posterior cervical cord lesion, C1-4 | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Open spinal fracture with anterior cervical cord lesion, C1-4 | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Closed fracture of C1-C4 level with incomplete cord lesion | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Revision of decompression of posterior fossa and upper cervical spinal cord | Procedure site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Incomplete spinal cord lesion at C1-C4 level without bone injury | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Anterior cervical spinal cord injury at C1-C4 level without spinal bone injury | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Central cervical cord injury, without spinal bony injury, C1-4 | Finding site | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Complete cervical cord injury, without spinal bone injury, C1-4 | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Posterior cervical spinal cord injury, without spinal bone injury, C1-4 | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 2 | 
| Open spinal fracture with posterior cervical cord lesion, C1-4 | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Anterior cervical spinal cord injury at C1-C4 level without spinal bone injury | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Central cervical cord injury, without spinal bony injury, C1-4 | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Anterior cord syndrome co-occurrent and due to open fracture of C1-C4 level | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 3 | 
| Anterior cord syndrome co-occurrent and due to open fracture of C5-C7 level | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 3 | 
| Anterior cord syndrome co-occurrent and due to closed fracture of C1-C4 level | Finding site | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 3 | 
| Revision decompression of posterior fossa and upper cervical spinal cord | Procedure site - Direct | False | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 | 
| Primary decompression of posterior fossa and upper cervical spinal cord | Procedure site - Direct | True | Structure of upper cervical spinal cord | Inferred relationship | Existential restriction modifier | 1 |