| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Early morning waking | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier |  | 
| Other cerebral hemorrhage following injury without mention of open intracranial wound, with no loss of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Open exploration of ventricle of brain | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Other cerebral 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 | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury with open intracranial wound | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subarachnoid hemorrhage following injury without open intracranial wound AND with concussion | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Aspiration of lesion of brain tissue NEC | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury with open intracranial wound, with no loss of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury with open intracranial wound, with concussion, unspecified | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Aspiration of cystic tumor of brain tissue | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Replacement of electroencephalographic receiver in brain | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Extradural hemorrhage following injury with open intracranial wound AND concussion | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Other cerebral hemorrhage following injury without mention of open intracranial wound, with 1-24 hours loss of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury with open intracranial wound AND concussion | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Maintenance of neurostimulator in brain | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Intracranial hemorrhage following injury with open intracranial wound AND concussion | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Exploration of ventricle of brain | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury without mention of open intracranial wound, with loss of consciousness of unspecified duration | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury without mention of open intracranial wound, with concussion, unspecified | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury with open intracranial wound, unspecified state of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury with open intracranial wound, with loss of consciousness of unspecified duration | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Aspiration of lesion of brain tissue | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 3 | 
| Diagnostic endoscopic examination of ventricle of brain NOS | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Other specified diagnostic endoscopic examination of ventricle of brain | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral 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 | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury without mention of open intracranial wound | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Other cerebral hemorrhage following injury without mention of open intracranial wound, unspecified state of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury without mention of open intracranial wound, with less than 1 hour loss of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral 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 | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury with open intracranial wound, with less than 1 hour loss of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury with open intracranial wound, with 1-24 hours loss of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Ventriculoscopic exploration of ventricle of brain | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 3 | 
| Other cerebral 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 | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Pilocytic astrocytoma of cerebellum | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Nocturnal sleep-related eating disorder | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier |  | 
| Other cerebral hemorrhage following injury without mention of open intracranial wound, with no loss of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Open exploration of ventricle of brain | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral 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 | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Other cerebral hemorrhage following injury with open intracranial wound | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Aspiration of lesion of brain tissue NEC | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury with open intracranial wound, with no loss of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury with open intracranial wound, with concussion, unspecified | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Aspiration of cystic tumor of brain tissue | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Replacement of electroencephalographic receiver in brain | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury without mention of open intracranial wound, with 1-24 hours loss of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Maintenance of neurostimulator in brain | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Exploration of ventricle of brain | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Other cerebral hemorrhage following injury without mention of open intracranial wound, with loss of consciousness of unspecified duration | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury without mention of open intracranial wound, with concussion, unspecified | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury with open intracranial wound, unspecified state of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Other cerebral hemorrhage following injury with open intracranial wound, with loss of consciousness of unspecified duration | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Aspiration of lesion of brain tissue | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Senile brain amyloidosis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Diagnostic endoscopic examination of ventricle of brain NOS | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 3 | 
| Other specified diagnostic endoscopic examination of ventricle of brain | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Connection from cystic brain tumor to subcutaneous reservoir | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Other cerebral 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 | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury without mention of open intracranial wound | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury without mention of open intracranial wound, unspecified state of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral hemorrhage following injury without mention of open intracranial wound, with less than 1 hour loss of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Other cerebral 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 | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Other cerebral hemorrhage following injury with open intracranial wound, with less than 1 hour loss of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 3 | 
| Other cerebral hemorrhage following injury with open intracranial wound, with 1-24 hours loss of consciousness | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Ventriculoscopic exploration of ventricle of brain | Procedure site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other cerebral 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 | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Progressive rubella panencephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| St. Louis encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Encephalitis lethargica | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Russian spring-summer encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subacute sclerosing panencephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Polioencephalitis | Finding site | True | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Arbovirus encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Rubella encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Toxoplasma encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Post-immunization encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Post-bacillus Calmette-Guerin vaccination encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Post-infectious encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Chronic echovirus meningoencephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 2 | 
| Acute viral encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Enteroviral encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Mosquito-borne alphavirus encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Mosquito-borne flavivirus encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Rocio virus encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Tensaw encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Tick-borne flavivirus encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Kumlinge virus encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Tick-borne orbivirus encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Rhabdovirus encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Infectious mononucleosis encephalitis | Finding site | True | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Herpes zoster encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Herpes simiae encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Chronic viral encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Bacterial encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Late syphilitic encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Fungal encephalitis | Finding site | True | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Parasitic encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Amebic encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Primary amebic encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Granulomatous amebic encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Post-influenza encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 | 
| Focal encephalitis | Finding site | False | Brain tissue structure | Inferred relationship | Existential restriction modifier | 1 |