| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Multiple fractures of forearm | Is a | True | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Fracture of radius | Is a | True | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Fracture of ulna | Is a | True | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Fracture of radius AND ulna | Is a | False | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Open fracture of forearm | Is a | True | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Closed fracture of forearm | Is a | True | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Open fracture radius and ulna, distal | Is a | False | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Pathological fracture - forearm | Is a | True | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Fracture malunion - forearm | Is a | True | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| [X]Fracture of other parts of forearm | Is a | False | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| [X]Fracture of forearm, unspecified | Is a | False | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Fracture of shaft of radius and/or ulna | Is a | True | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Fracture of radius and/or ulna due to birth trauma | Is a | True | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Fracture dislocation distal radioulnar joint | Is a | True | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Fracture subluxation of superior radioulnar joint | Is a | True | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Open fracture of forearm, lower end, unspecified | Is a | False | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Open fracture of forearm, lower end, NOS | Is a | False | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| [X]Fracture of forearm, unspecified | Is a | False | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| [X]Fracture of other parts of forearm | Is a | False | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Open fracture of forearm, lower end, unspecified | Is a | False | Fracture of forearm | Inferred relationship | Existential restriction modifier |  | 
| Open fracture of forearm, lower end, NOS | Is a | False | Fracture of forearm | Inferred relationship | Existential restriction modifier |  |