| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Entire distal phalanx of thumb | Is a | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier |  | 
| Structure of base of distal phalanx of thumb | Is a | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier |  | 
| Structure of shaft of distal phalanx of thumb | Is a | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier |  | 
| Structure of neck of distal phalanx of thumb | Is a | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier |  | 
| Structure of head of distal phalanx of thumb | Is a | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier |  | 
| Structure of epiphysis of distal phalanx of thumb | Is a | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier |  | 
| Structure of tuberosity of distal phalanx of thumb | Is a | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier |  | 
| Closed fracture thumb distal phalanx | Finding site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture thumb distal phalanx | Finding site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 2 | 
| Open fracture thumb distal phalanx | Finding site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture thumb distal phalanx | Finding site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 2 | 
| Amputation of thumb through distal phalanx | Procedure site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Fracture distal phalanx of thumb | Finding site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture thumb distal phalanx, base | Finding site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 2 | 
| Closed fracture thumb distal phalanx, shaft | Finding site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 2 | 
| Closed fracture thumb distal phalanx, tuft | Finding site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture thumb distal phalanx, mallet | Finding site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture thumb distal phalanx, base | Finding site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 2 | 
| Open fracture thumb distal phalanx, shaft | Finding site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 2 | 
| Open fracture thumb distal phalanx, tuft | Finding site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture thumb distal phalanx, mallet | Finding site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Amputation of thumb through distal phalanx | Procedure site - Direct | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture thumb distal phalanx, tuft | Finding site | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture thumb distal phalanx, mallet | Finding site | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Fracture distal phalanx of thumb | Finding site | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture thumb distal phalanx, mallet | Finding site | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture thumb distal phalanx, tuft | Finding site | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Amputation of thumb through distal phalanx | Procedure site - Direct | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture thumb distal phalanx | Finding site | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture thumb distal phalanx | Finding site | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Percutaneous skeletal fixation of distal phalangeal fracture of thumb | Procedure site - Direct | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Open reduction of fracture of distal phalanx of thumb with internal fixation | Procedure site - Direct | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Open reduction of fracture of distal phalanx of thumb with internal fixation | Procedure site - Direct | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 2 | 
| Percutaneous skeletal fixation of distal phalangeal fracture of thumb | Procedure site - Direct | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Bone structure of distal phalanx of left thumb | Is a | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier |  | 
| Bone structure of distal phalanx of right thumb | Is a | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier |  | 
| Traumatic amputation, thumb tip | Finding site | False | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Brachydactyly type D | Finding site | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 1 | 
| Traumatic amputation thumb tip, type 3 (partial loss of terminal phalanx with corresponding loss of pulp and nail but not involving lunula) | Finding site | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 2 | 
| Traumatic amputation thumb tip, type 4 (partial loss of terminal phalanx, pulp and nail including lunula) | Finding site | True | Bone structure of distal phalanx of thumb | Inferred relationship | Existential restriction modifier | 3 |