| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Precerebral arterial occlusion | Finding site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Head artery cytotoxic injection | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Other precerebral artery occlusion | Finding site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Precerebral artery occlusion NOS | Finding site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Cranial branch of vertebral artery | Is a | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some |  | 
| Cervical branch of vertebral artery | Is a | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some |  | 
| Fluoroscopy guided embolisation of artery of head and/or neck with contrast | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Artery of internal nose | Is a | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some |  | 
| Structure of artery of head | Is a | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some |  | 
| Structure of artery of neck | Is a | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some |  | 
| Branch of inferior thyroid artery | Is a | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some |  | 
| External carotid artery and its branches | Is a | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some |  | 
| Structure of precerebral and/or intracranial artery | Is a | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some |  | 
| Carotid artery structure | Is a | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some |  | 
| Embolic stroke | Finding site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Multiple AND bilateral precerebral artery thrombosis | Finding site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 2 | 
| Carotid artery angiography | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 3 | 
| Unilateral imaging of carotid artery | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Angiography of external carotid artery | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 3 | 
| Unilateral imaging of external carotid artery | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 3 | 
| Percutaneous endarterectomy of intracranial artery | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Thrombosis of precerebral artery | Finding site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 2 | 
| Unilateral imaging of cervical carotid artery | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 2 | 
| Vertebral artery thrombosis | Finding site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 3 | 
| Carotid artery thrombosis | Finding site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 3 | 
| Basilar artery thrombosis | Finding site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 3 | 
| Structure of artery of inner ear | Is a | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some |  | 
| Cerebral four vessel angiogram | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 2 | 
| Angiography of common carotid artery | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Angiography of internal carotid artery | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Removal of embolus of head and neck artery | Procedure site - Indirect | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Angiography of bilateral cervical vertebral arteries | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 2 | 
| Unilateral imaging of cervical vertebral artery | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 2 | 
| Unilateral imaging of internal carotid artery | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Angiography of cervical vertebral and intracranial arteries | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Selective carotid artery angiography | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 3 | 
| Supraaortic branches | Is a | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some |  | 
| Aneurysm of head and neck artery | Finding site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Cardioembolic stroke | Finding site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Gas endarterectomy of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Excision of artery of head and neck | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Endarterectomy of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Aneurysmectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Aneurysmectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 3 | 
| Arteriectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Arteriectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 2 | 
| Excision of lesion of artery of head and neck | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Thrombectomy of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 2 | 
| Thrombectomy of head and neck artery | Procedure site - Indirect | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Aneurysmectomy of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Aneurysmectomy with graft replacement of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Arteriectomy with graft replacement of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Aneurysmectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 3 | 
| Aneurysmectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Arteriectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Arteriectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 2 | 
| Structure of thymic branch of internal thoracic artery | Is a | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some |  | 
| Aneurysmectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Aneurysmectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 3 | 
| Arteriectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 2 | 
| Arteriectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Aneurysmectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Aneurysmectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 3 | 
| Arteriectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Arteriectomy with anastomosis of head and neck artery | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 2 | 
| Transplant of artery of head and neck | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Angiography of cervicocerebral arteries | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Endoscopy of artery of head and neck | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Repair of artery of head and neck | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Injection of artery of head and neck | Procedure site - Indirect | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Surgical occlusion of artery of head and neck | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Exploration of artery of head and neck | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Angiography of artery of head and neck | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Ligation of artery of head and neck | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Incision of artery of head and neck | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Surgical occlusion of intracranial artery | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 2 | 
| Division of artery of head and neck | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Aneurysmectomy with anastomosis of head and neck artery | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 2 | 
| Aneurysmectomy with anastomosis of head and neck artery | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Arteriectomy with anastomosis of head and neck artery | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 2 | 
| Arteriectomy with anastomosis of head and neck artery | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Gas endarterectomy of head and neck artery | Procedure site - Indirect | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Excision of lesion of artery of head and neck | Procedure site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Endarterectomy of head and neck artery | Procedure site - Indirect | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Endarterectomy of head and neck artery | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 3 | 
| Removal of embolus of head and neck artery | Procedure site - Indirect | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Gas endarterectomy of head and neck artery | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 3 | 
| Intravenous digital subtraction angiography of cervicocerebral arteries | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Angiography of cerebral arteries | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Excision of lesion of artery of head and neck | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Percutaneous endarterectomy of intracranial artery | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 3 | 
| Ligation of artery of head and neck | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Division of artery of head and neck | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Head and neck arterial embolus | Finding site | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Angiography of cervicocerebral arteries | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Head and neck arterial thrombosis | Finding site | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Aneurysm of neck artery NOS | Finding site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Endoscopy of artery of head and neck | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Exploration of artery of head and neck | Procedure site - Direct | True | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Multiple and bilateral precerebral arterial occlusion | Finding site | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 | 
| Incision of artery of head and neck | Procedure site - Direct | False | Structure of artery of head, neck AND/OR brain | Inferred relationship | Some | 1 |