| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Entire subdural space of brain | Is a | False | Subdural space structure | Inferred relationship | Existential restriction modifier |  | 
| Structure of subdural space of spinal cord | Is a | False | Subdural space structure | Inferred relationship | Existential restriction modifier |  | 
| Entire subdural space | Is a | True | Subdural space structure | Inferred relationship | Existential restriction modifier |  | 
| Structure of subdural space of spinal region | Is a | True | Subdural space structure | Inferred relationship | Existential restriction modifier |  | 
| Intracranial subdural space structure | Is a | True | Subdural space structure | Inferred relationship | Existential restriction modifier |  | 
| Rate of pupil reaction to light | Procedure site | False | Subdural space structure | Inferred relationship | Existential restriction modifier |  | 
| Pupil motor light reaction | Procedure site | False | Subdural space structure | Inferred relationship | Existential restriction modifier |  | 
| Pupil reaction to dark | Procedure site | False | Subdural space structure | Inferred relationship | Existential restriction modifier |  | 
| Pupil reaction to light | Procedure site | False | Subdural space structure | Inferred relationship | Existential restriction modifier |  | 
| Non-traumatic intracranial subdural hematoma | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Non-traumatic spinal subdural hematoma | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural intracranial hemorrhage due to birth trauma | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury with open intracranial wound | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage due to intrapartum anoxia AND/OR hypoxia | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury without open intracranial wound AND with brief loss of consciousness (less than one hour) | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Subdural hemorrhage following injury with open intracranial wound AND brief loss of consciousness (less than one hour) | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Nontraumatic subdural hemorrhage | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury without open intracranial wound AND with loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Subdural intracranial hemorrhage | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury without open intracranial wound AND with no loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury with open intracranial wound AND concussion | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural intracranial hemorrhage in fetus or newborn | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury with open intracranial wound AND loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Pupil afferent light reaction | Procedure site | False | Subdural space structure | Inferred relationship | Existential restriction modifier |  | 
| Subdural 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 | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury without open intracranial wound AND with moderate loss of consciousness (1-24 hours) | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 4 | 
| Subdural hemorrhage following injury with open intracranial wound AND no loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury without open intracranial wound AND with concussion | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural-peritoneal shunt with valve | Procedure site | False | Subdural space structure | Inferred relationship | Existential restriction modifier |  | 
| Local subdural hematoma as birth trauma | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Subdural hemorrhage following injury without open intracranial wound AND with prolonged loss of consciousness (more than 24 hours) without return to pre-existing conscious level | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Injection of anesthetic substance, therapeutic, subdural, differential | Procedure site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury without open intracranial wound | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Injection of anesthetic substance, therapeutic, subdural, continuous | Procedure site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural 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 | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury with open intracranial wound AND moderate loss of consciousness (1-24 hours) | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 4 | 
| Subdural intracranial hematoma | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Non-traumatic intracranial subdural hemorrhage | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Closed traumatic subdural intracranial hemorrhage | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Traumatic subdural intracranial hemorrhage | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier |  | 
| Subdural hemorrhage following injury without mention of open intracranial wound, unspecified state of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with loss of consciousness of unspecified duration | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with concussion, unspecified | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Traumatic subdural hematoma | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Subdural abscess | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with no loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with less than 1 hour loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with 1-24 hours loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural 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 | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural 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 | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following open wound of head | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Traumatic subdural hematoma without open intracranial wound | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Traumatic subdural hematoma with open intracranial wound | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury with open intracranial wound and prolonged loss of consciousness (more than 24 hours) and without return to pre-existing conscious level | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Local intracranial subdural hematoma due to birth trauma | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury with open intracranial wound, unspecified state of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury with open intracranial wound, with no loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury with open intracranial wound, with less than 1 hour loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury with open intracranial wound, with 1-24 hours loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Subdural 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 | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural 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 | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury with open intracranial wound, with loss of consciousness of unspecified duration | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 4 | 
| Subdural hemorrhage following injury with open intracranial wound, with concussion, unspecified | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Traumatic intracranial subdural hematoma | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Chronic intracranial subdural hematoma | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Traumatic intracranial subdural hematoma with brief loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, unspecified state of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 4 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with loss of consciousness of unspecified duration | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 4 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with concussion, unspecified | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Closed traumatic subdural intracranial hemorrhage | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 4 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, unspecified state of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with loss of consciousness of unspecified duration | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with concussion, unspecified | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with no loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with less than 1 hour loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with 1-24 hours loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural 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 | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural 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 | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Closed traumatic subdural intracranial hemorrhage | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Subdural 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 | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with no loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Closed traumatic subdural intracranial hemorrhage | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, unspecified state of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural 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 | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with 1-24 hours loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with concussion, unspecified | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with loss of consciousness of unspecified duration | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with less than 1 hour loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural intracranial hemorrhage due to birth trauma | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural 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 | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with no loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Closed traumatic subdural intracranial hemorrhage | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, unspecified state of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Subdural 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 | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with 1-24 hours loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Local intracranial subdural hematoma due to birth trauma | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with concussion, unspecified | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 2 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with loss of consciousness of unspecified duration | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 | 
| Subdural hemorrhage following injury without mention of open intracranial wound, with less than 1 hour loss of consciousness | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 3 | 
| Non-traumatic subdural hematoma | Finding site | False | Subdural space structure | Inferred relationship | Existential restriction modifier | 1 |