| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Entire spinal subarachnoid space (body structure) | Is a | False | Subarachnoid space structure | Inferred relationship | Some |  | 
| Entire subarachnoid space of brain (body structure) | Is a | False | Subarachnoid space structure | Inferred relationship | Some |  | 
| Entire subarachnoid space | Is a | True | Subarachnoid space structure | Inferred relationship | Some |  | 
| Structure of perivascular space of brain (body structure) | Is a | True | Subarachnoid space structure | Inferred relationship | Some |  | 
| Structure of subarachnoid space of brain (body structure) | Is a | True | Subarachnoid space structure | Inferred relationship | Some |  | 
| Structure of spinal subarachnoid space (body structure) | Is a | True | Subarachnoid space structure | Inferred relationship | Some |  | 
| Cerebrospinal fluid pressure recording | Procedure site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid hemorrhage following injury with open intracranial wound, unspecified state of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 4 | 
| Subarachnoid hemorrhage following injury with open intracranial wound, with no loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage following injury with open intracranial wound, with less than 1 hour loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage following injury with open intracranial wound, with 1-24 hours loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage following injury with open intracranial wound, with more than 24 hours loss of consciousness and return to pre-existing conscious level | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage following injury with open intracranial wound, with more than 24 hours loss of consciousness without return to pre-existing conscious level | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage following injury with open intracranial wound, with loss of consciousness of unspecified duration | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 4 | 
| Subarachnoid hemorrhage following injury with open intracranial wound, with concussion, unspecified | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 4 | 
| Traumatic spinal subarachnoid hemorrhage | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Traumatic subarachnoid intracranial hemorrhage | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid hemorrhage due to traumatic injury | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Spontaneous subarachnoid hemorrhage | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Angiogram-negative subarachnoid hemorrhage | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with prolonged loss of consciousness (more than 24 hours) AND without return to pre-existing conscious level | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 2 | 
| Subarachnoid hemorrhage | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid hemorrhage following injury without open intracranial wound | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 4 | 
| Semicircular-subarachnoid shunt | Procedure site | False | Subarachnoid space structure | Inferred relationship | Some |  | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with no loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Endolymphatic-subarachnoid shunt | Procedure site | False | Subarachnoid space structure | Inferred relationship | Some |  | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with concussion | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 5 | 
| Subarachnoid hemorrhage following injury with open intracranial wound AND concussion | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid hemorrhage following injury with open intracranial wound | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 4 | 
| Subarachnoid hemorrhage following injury with open intracranial wound AND brief loss of consciousness (less than one hour) | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid hemorrhage following injury with open intracranial wound AND prolonged loss of consciousness (more than 24 hours) without return to pre-existing conscious level | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 4 | 
| Subarachnoid hemorrhage following injury with open intracranial wound AND prolonged loss of consciousness (more than 24 hours) AND return to pre-existing conscious level | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Fistulization of cerebral subarachnoid space | Procedure site | False | Subarachnoid space structure | Inferred relationship | Some |  | 
| Subarachnoid hemorrhage following injury with open intracranial wound AND loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 4 | 
| Subarachnoid hemorrhage following injury with open intracranial wound AND no loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with brief loss of consciousness (less than one hour) | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid hemorrhage following injury with open intracranial wound AND moderate loss of consciousness (1-24 hours) | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with prolonged loss of consciousness (more than 24 hours) AND return to pre-existing conscious level | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Rupture of syphilitic cerebral aneurysm | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage from carotid siphon and bifurcation | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid haemorrhage from vertebral artery | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage due to birth injury | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage following injury without mention of open intracranial wound, with no loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage following injury without mention of open intracranial wound, with less than 1 hour loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 2 | 
| Subarachnoid hemorrhage following injury without mention of open intracranial wound, with 1-24 hours loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid hemorrhage following injury without mention of open intracranial wound, with more than 24 hours loss of consciousness and return to pre-existing conscious level | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage following injury without mention of open intracranial wound, with more than 24 hours loss of consciousness without return to pre-existing conscious level | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Open traumatic subarachnoid hemorrhage | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid haemorrhage due to ruptured arteriovenous malformation | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage due to ruptured aneurysm | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Closed traumatic subarachnoid hemorrhage | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with moderate loss of consciousness (1-24 hours) | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid haemorrhage from multiple aneurysms | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid haemorrhage from anterior cerebral artery aneurysm | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid haemorrhage from middle cerebral artery aneurysm | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage from posterior cerebral artery aneurysm | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid haemorrhage from anterior communicating artery aneurysm | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage from posterior communicating artery aneurysm | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid haemorrhage from basilar artery aneurysm | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid hemorrhage from posterior inferior cerebellar artery aneurysm | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Subarachnoid haemorrhage from carotid artery aneurysm | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 6 | 
| Cytotoxic subarachnoid injection | Procedure site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid hemorrhage NOS | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| [X]Subarachnoid hemorrhage from other intracranial arteries | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| [X]Other subarachnoid hemorrhage | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| [X]Subarachnoid hemorrhage from intracranial artery, unspecified | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid hemorrhage following injury without mention of open intracranial wound, unspecified state of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid hemorrhage following injury without mention of open intracranial wound, with loss of consciousness of unspecified duration | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid hemorrhage following injury without mention of open intracranial wound, with concussion, unspecified | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Revision of lumbosubarachnoid shunt | Procedure site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid hemorrhage precautions | Procedure site | False | Subarachnoid space structure | Inferred relationship | Some |  | 
| Closed traumatic subarachnoid hemorrhage | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with moderate loss of consciousness (1-24 hours) | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 4 | 
| Subarachnoid hemorrhage following injury without mention of open intracranial wound, unspecified state of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid hemorrhage following injury without mention of open intracranial wound, with loss of consciousness of unspecified duration | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid hemorrhage following injury without mention of open intracranial wound, with concussion, unspecified | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 4 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with prolonged loss of consciousness (more than 24 hours) AND without return to pre-existing conscious level | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 4 | 
| Subarachnoid hemorrhage following injury without open intracranial wound | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 2 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with no loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 2 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with concussion | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 2 | 
| Subarachnoid hemorrhage following injury with open intracranial wound AND concussion | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid hemorrhage following injury with open intracranial wound | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 4 | 
| Subarachnoid hemorrhage following injury with open intracranial wound AND brief loss of consciousness (less than one hour) | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid hemorrhage following injury with open intracranial wound AND prolonged loss of consciousness (more than 24 hours) without return to pre-existing conscious level | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 7 | 
| Subarachnoid hemorrhage following injury with open intracranial wound AND loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 2 | 
| Subarachnoid hemorrhage following injury with open intracranial wound AND no loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 2 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with brief loss of consciousness (less than one hour) | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with prolonged loss of consciousness (more than 24 hours) AND return to pre-existing conscious level | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 8 | 
| Open traumatic subarachnoid hemorrhage | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 5 | 
| Closed traumatic subarachnoid hemorrhage | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with moderate loss of consciousness (1-24 hours) | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid hemorrhage following injury without mention of open intracranial wound, unspecified state of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 2 | 
| Subarachnoid hemorrhage following injury without mention of open intracranial wound, with loss of consciousness of unspecified duration | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid hemorrhage following injury without mention of open intracranial wound, with concussion, unspecified | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with prolonged loss of consciousness (more than 24 hours) AND without return to pre-existing conscious level | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 1 | 
| Subarachnoid hemorrhage following injury without open intracranial wound | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 4 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with no loss of consciousness | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 4 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with concussion | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 5 | 
| Subarachnoid hemorrhage following injury with open intracranial wound AND concussion | Finding site | False | Subarachnoid space structure | Inferred relationship | Some | 3 |