| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Structure of basal meninges | Is a | False | Brain part | Inferred relationship | Some |  | 
| Interstitial tissue of brain | Is a | True | Brain part | Inferred relationship | Some |  | 
| Brain tissue structure | Is a | True | Brain part | Inferred relationship | Some |  | 
| Surface of brain | Is a | True | Brain part | Inferred relationship | Some |  | 
| Structure of medial reticulospinal tract | Is a | True | Brain part | Inferred relationship | Some |  | 
| Structure of lateral spinothalamic tract | Is a | True | Brain part | Inferred relationship | Some |  | 
| Infratentorial brain structure (body structure) | Is a | False | Brain part | Inferred relationship | Some |  | 
| Structure of dorsal spinocerebellar tract | Is a | True | Brain part | Inferred relationship | Some |  | 
| Structure of ventral spinothalamic tract | Is a | False | Brain part | Inferred relationship | Some |  | 
| Optical layer and corpus striatum | Is a | False | Brain part | Inferred relationship | Some |  | 
| Structure of vestibulospinal tract | Is a | False | Brain part | Inferred relationship | Some |  | 
| Cavum vergae | Is a | False | Brain part | Inferred relationship | Some |  | 
| Brain ventricle structure | Is a | False | Brain part | Inferred relationship | Some |  | 
| Structure of gyrus of brain (body structure) | Is a | True | Brain part | Inferred relationship | Some |  | 
| Lateral proper fasciculus | Is a | False | Brain part | Inferred relationship | Some |  | 
| Lateral spinorubral tract | Is a | False | Brain part | Inferred relationship | Some |  | 
| Structure of tentorium cerebelli (body structure) | Is a | False | Brain part | Inferred relationship | Some |  | 
| Structure of lateral root of optic tract | Is a | False | Brain part | Inferred relationship | Some |  | 
| Optic nerve chiasma | Is a | False | Brain part | Inferred relationship | Some |  | 
| Meninges of cerebral convex surface | Is a | False | Brain part | Inferred relationship | Some |  | 
| Structure of sulcus of brain (body structure) | Is a | True | Brain part | Inferred relationship | Some |  | 
| Extrapyramidal system structure | Is a | True | Brain part | Inferred relationship | Some |  | 
| Structure of ventral spinocerebellar tract | Is a | True | Brain part | Inferred relationship | Some |  | 
| Structure of falx cerebri | Is a | True | Brain part | Inferred relationship | Some |  | 
| Structure of falx cerebelli | Is a | False | Brain part | Inferred relationship | Some |  | 
| Prosencephalon structure | Is a | False | Brain part | Inferred relationship | Some |  | 
| Periventricular gray matter | Is a | True | Brain part | Inferred relationship | Some |  | 
| Specified tissue of brain NEC | Is a | False | Brain part | Inferred relationship | Some |  | 
| Tissue of brain NEC | Is a | False | Brain part | Inferred relationship | Some |  | 
| Structure of lobe of brain | Is a | False | Brain part | Inferred relationship | Some |  | 
| Congenital hypoplasia of part of brain | Finding site | False | Brain part | Inferred relationship | Some | 1 | 
| Other biopsy of lesion of brain tissue | Procedure site | False | Brain part | Inferred relationship | Some | 1 | 
| Biopsy of lesion of temporal lobe of brain NEC | Procedure site | False | Brain part | Inferred relationship | Some | 1 | 
| Biopsy of lesion of parietal lobe of brain NEC | Procedure site | False | Brain part | Inferred relationship | Some | 1 | 
| Biopsy of lesion of occipital lobe of brain NEC | Procedure site | False | Brain part | Inferred relationship | Some | 1 | 
| Biopsy of lesion of cerebellum NEC | Procedure site | False | Brain part | Inferred relationship | Some | 1 | 
| Biopsy of lesion of brainstem NEC | Procedure site | False | Brain part | Inferred relationship | Some | 1 | 
| Other specified other biopsy of lesion of brain tissue | Procedure site | False | Brain part | Inferred relationship | Some | 1 | 
| Other biopsy of lesion of brain tissue NOS | Procedure site | False | Brain part | Inferred relationship | Some | 1 | 
| Excisional biopsy of brain, percutaneous, needle | Procedure site | False | Brain part | Inferred relationship | Some | 1 | 
| Excisional biopsy of brain, percutaneous, needle | Procedure site | False | Brain part | Inferred relationship | Some | 1 | 
| Biopsy of brain tissue | Procedure site | False | Brain part | Inferred relationship | Some | 1 | 
| Non-surgical biopsy of brain (procedure) | Procedure site | False | Brain part | Inferred relationship | Some | 1 | 
| Closed excisional biopsy of brain (procedure) | Procedure site | False | Brain part | Inferred relationship | Some | 1 | 
| Excisional biopsy of brain | Procedure site | False | Brain part | Inferred relationship | Some | 1 | 
| Excisional biopsy of brain, percutaneous, needle | Procedure site | False | Brain part | Inferred relationship | Some | 2 | 
| Excisional biopsy of brain, percutaneous, needle | Procedure site | False | Brain part | Inferred relationship | Some | 2 | 
| Excisional biopsy of brain, percutaneous, needle | Procedure site | False | Brain part | Inferred relationship | Some | 2 | 
| Brain ventricle part | Is a | True | Brain part | Inferred relationship | Some |  | 
| Excisional biopsy of brain, percutaneous, needle | Procedure site | False | Brain part | Inferred relationship | Some | 3 | 
| Excisional biopsy of brain, percutaneous, needle | Procedure site | False | Brain part | Inferred relationship | Some | 2 | 
| Hydranencephaly with proliferative vasculopathy | Finding site | False | Brain part | Inferred relationship | Some | 1 | 
| Hemicephaly | Finding site | False | Brain part | Inferred relationship | Some | 2 | 
| Acquired periventricular cysts of newborn | Finding site | False | Brain part | Inferred relationship | Some | 1 | 
| Acquired periventricular cyst | Finding site | False | Brain part | Inferred relationship | Some | 1 | 
| Hemispheric cerebellar agenesis (disorder) | Finding site | False | Brain part | Inferred relationship | Some | 1 | 
| Congenital absence of part of brain | Finding site | True | Brain part | Inferred relationship | Some | 1 | 
| Hydranencephaly | Finding site | False | Brain part | Inferred relationship | Some | 1 | 
| Hemispheric cerebral agenesis | Finding site | False | Brain part | Inferred relationship | Some | 1 | 
| Excisional biopsy of brain, percutaneous, needle | Procedure site - Direct (attribute) | False | Brain part | Inferred relationship | Some | 2 | 
| Non-surgical biopsy of brain (procedure) | Procedure site - Direct (attribute) | False | Brain part | Inferred relationship | Some | 1 | 
| Structure of half of brain lateral to midsagittal plane (body structure) | Is a | False | Brain part | Inferred relationship | Some |  | 
| Hydranencephaly with proliferative vasculopathy | Finding site | False | Brain part | Inferred relationship | Some | 1 | 
| Congenital hypoplasia of part of brain | Finding site | True | Brain part | Inferred relationship | Some | 1 | 
| Hydranencephaly | Finding site | False | Brain part | Inferred relationship | Some | 1 | 
| Hemicephaly | Finding site | False | Brain part | Inferred relationship | Some | 2 | 
| Acquired periventricular cyst | Finding site | True | Brain part | Inferred relationship | Some | 1 | 
| Congenital absence of part of brain | Finding site | False | Brain part | Inferred relationship | Some | 1 | 
| Acquired periventricular cysts of newborn | Finding site | True | Brain part | Inferred relationship | Some | 1 | 
| Hydranencephaly | Finding site | False | Brain part | Inferred relationship | Some | 2 | 
| Hydranencephaly with proliferative vasculopathy | Finding site | False | Brain part | Inferred relationship | Some | 2 | 
| Hemicephaly | Finding site | False | Brain part | Inferred relationship | Some | 3 | 
| Congenital absence of part of brain | Finding site | False | Brain part | Inferred relationship | Some | 2 | 
| Congenital hypoplasia of part of brain | Finding site | False | Brain part | Inferred relationship | Some | 2 | 
| Hemicephaly | Finding site | True | Brain part | Inferred relationship | Some | 1 | 
| Subependymal region | Is a | True | Brain part | Inferred relationship | Some |  | 
| Brain region | Is a | True | Brain part | Inferred relationship | Some |  | 
| Structure of rubrospinal tract (body structure) | Is a | True | Brain part | Inferred relationship | Some |  | 
| Structure of nucleus of brain (body structure) | Is a | True | Brain part | Inferred relationship | Some |  |