| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Epidural injection of anesthetic substance, therapeutic, caudal, continuous | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Local anesthetic cervical epidural block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Spinal anesthesia | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Epidural injection of anesthetic substance, therapeutic, lumbar, continuous | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Low dose epidural | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Local anesthetic intrathecal block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Combined spinal/epidural technique with needles at separate spaces | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Local anesthetic sacral epidural block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Local anesthetic lumbar epidural block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Epidural anesthetic NEC | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Local anesthetic thoracic intrathecal block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Hydromyelocele NOS | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Epidural injection of anesthetic substance, diagnostic, caudal, continuous | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Neurolytic nerve block around spinal cord meninges | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Local anesthetic lumbar intrathecal block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Local anesthetic lumbar intrathecal block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Local anesthetic cervical intrathecal block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Saddle block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Saddle block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Freeing of spinal tether | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Biopsy of lesion of spinal cord meninges | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Combined spinal/epidural technique - spinal needle through Tuohy needle | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Combined spinal/epidural local anesthetic block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Local anesthetic nerve block around spinal cord meninges | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Biopsy of meninges of spinal cord | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Hydromyelocele of unspecified site | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Local anesthetic thoracic epidural block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 4 | 
| Epidural injection of anesthetic substance, diagnostic, lumbar, continuous | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 4 | 
| Other specified spinal anesthetic | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Extirpation of lesion of meninges of spinal cord | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Epidural anesthesia | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Spinal anesthetic NOS | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Spinal subdural local anesthetic block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Marsupialization of cyst of spinal meninges | Procedure site - Indirect | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Cervical subdural block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Thoracic subdural block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 4 | 
| Lumbar subdural block | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Obliteration of sacral meningocele | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Obliteration of sacral meningocele | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 4 | 
| Other specified repair of spina bifida | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Other specified repair of spina bifida | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Repair of spina bifida NOS | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Repair of spina bifida NOS | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Biopsy of lesion of spinal cord meninges | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Biopsy of lesion of spinal cord meninges | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Hydromyelocele | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 4 | 
| Hydromyelocele | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 5 | 
| Hydromyelocele with hydrocephalus | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Hydromyelocele with hydrocephalus | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 5 | 
| Hydromyelocele of unspecified site | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Hydromyelocele of unspecified site | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Hydromyelocele of unspecified site | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Hydromyelocele NOS | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Hydromyelocele NOS | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Hydromyelocele NOS | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Freeing of spinal tether | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Freeing of spinal tether | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Biopsy of meninges of spinal cord | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Biopsy of meninges of spinal cord | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Repair of spinal myelomeningocele using distant flap | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Repair of spinal myelomeningocele using distant flap | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Repair of spinal myelomeningocele using free flap | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Repair of spinal myelomeningocele using free flap | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Repair of spinal meningocele using local flap | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Repair of spinal meningocele using local flap | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Repair of spinal meningocele using distant flap | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Repair of spinal meningocele using distant flap | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Repair of spinal meningocele using free flap | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Repair of spinal meningocele using free flap | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Repair of spina bifida | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Repair of spina bifida | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Known OR suspected fetal spina bifida with myelomeningocele affecting obstetrical care | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Known OR suspected fetal spina bifida with myelomeningocele affecting obstetrical care | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 4 | 
| Repair of vertebral arch defect in spina bifida | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Repair of vertebral arch defect in spina bifida | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Excision of tumor of spinal cord meninges | Procedure site - Direct | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Excision of cyst of spinal cord meninges | Procedure site - Direct | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Meningomyelocele | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Excision of lesion of spinal meninges | Procedure site - Direct | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Suture of spinal meninges | Procedure site - Direct | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Biopsy of lesion of spinal cord meninges | Procedure site - Direct | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Biopsy of meninges of spinal cord | Procedure site - Direct | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Curettage of spinal meninges | Procedure site - Direct | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Obliteration of sacral meningocele | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Obliteration of sacral meningocele | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Other specified repair of spina bifida | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Other specified repair of spina bifida | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Repair of spina bifida NOS | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Repair of spina bifida NOS | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Hydromyelocele | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Hydromyelocele | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 4 | 
| Hydromyelocele with hydrocephalus | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 4 | 
| Hydromyelocele with hydrocephalus | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 7 | 
| Hydromyelocele of unspecified site | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Hydromyelocele of unspecified site | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Hydromyelocele of unspecified site | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 4 | 
| Hydromyelocele NOS | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 4 | 
| Hydromyelocele NOS | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 | 
| Hydromyelocele NOS | Finding site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 3 | 
| Freeing of spinal tether | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 1 | 
| Freeing of spinal tether | Procedure site | False | Spinal cord meninges structure | Inferred relationship | Existential restriction modifier | 2 |