| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Total excision of body of sacral vertebra with decompression of spinal cord, nerve roots and cauda equina by transperitoneal approach | Surgical approach | True | Transperitoneal approach to spine | Inferred relationship | Existential restriction modifier | 1 | 
| Total excision of body of sacral vertebra with decompression of spinal cord, nerve roots and cauda equina by transperitoneal approach | Surgical approach | True | Transperitoneal approach to spine | Inferred relationship | Existential restriction modifier | 2 | 
| Total excision of body of sacral vertebra with decompression of spinal cord, nerve roots and cauda equina by transperitoneal approach | Surgical approach | True | Transperitoneal approach to spine | Inferred relationship | Existential restriction modifier | 3 | 
| Partial excision of body of lumbar vertebra with decompression of spinal cord, nerve roots and cauda equina by transperitoneal approach | Surgical approach | True | Transperitoneal approach to spine | Inferred relationship | Existential restriction modifier | 1 | 
| Partial excision of body of lumbar vertebra with decompression of spinal cord, nerve roots and cauda equina by transperitoneal approach | Surgical approach | True | Transperitoneal approach to spine | Inferred relationship | Existential restriction modifier | 2 | 
| Partial excision of body of lumbar vertebra with decompression of spinal cord, nerve roots and cauda equina by transperitoneal approach | Surgical approach | True | Transperitoneal approach to spine | Inferred relationship | Existential restriction modifier | 3 | 
| Partial excision of body of sacral vertebra with decompression of spinal cord, nerve roots and cauda equina by transperitoneal approach | Surgical approach | True | Transperitoneal approach to spine | Inferred relationship | Existential restriction modifier | 1 | 
| Partial excision of body of sacral vertebra with decompression of spinal cord, nerve roots and cauda equina by transperitoneal approach | Surgical approach | True | Transperitoneal approach to spine | Inferred relationship | Existential restriction modifier | 2 | 
| Partial excision of body of sacral vertebra with decompression of spinal cord, nerve roots and cauda equina by transperitoneal approach | Surgical approach | True | Transperitoneal approach to spine | Inferred relationship | Existential restriction modifier | 3 | 
| Total excision of body of lumbar vertebra with decompression of spinal cord, nerve roots and cauda equina by transperitoneal approach | Surgical approach | True | Transperitoneal approach to spine | Inferred relationship | Existential restriction modifier | 1 | 
| Total excision of body of lumbar vertebra with decompression of spinal cord, nerve roots and cauda equina by transperitoneal approach | Surgical approach | True | Transperitoneal approach to spine | Inferred relationship | Existential restriction modifier | 2 | 
| Total excision of body of lumbar vertebra with decompression of spinal cord, nerve roots and cauda equina by transperitoneal approach | Surgical approach | True | Transperitoneal approach to spine | Inferred relationship | Existential restriction modifier | 3 | 
| Transperitoneal approach to lumbar spine | Is a | True | Transperitoneal approach to spine | Inferred relationship | Existential restriction modifier |  |