| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Transverse deficiency of arm, forearm level | Is a | False | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Congenital absence of ulna | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Congenital absence of humerus | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Congenital absence of radius | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Congenital absence of metacarpal bone | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Congenital absence of forepaw phalanx | Is a | False | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Agenesis of clavicle | Is a | False | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Congenital absence of carpal bone | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Traumatic amputation, thumb, proximal phalanx | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Traumatic amputation, finger, proximal phalanx | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Absence of scapula | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Longitudinal absence of radius AND ulna | Is a | False | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Ectromelia of upper limb | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Partial aphalangia of upper limb | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Radial aplasia-thrombocytopenia syndrome | Is a | False | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Partial radial absence | Is a | False | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Absent radius, anogenital anomalies syndrome | Is a | False | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Aplasia of trochlea of humerus | Is a | False | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Absence of clavicle | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Traumatic amputation, thumb tip | Is a | False | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Traumatic amputation, thumb, through metacarpal | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Transverse arrest carpal level | Is a | False | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Transverse arrest metacarpal first ray | Is a | False | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Transverse arrest metacarpal second to fifth rays | Is a | False | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Complete aphalangia of upper limb | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Agenesis of scapula | Is a | False | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Traumatic amputation thumb tip, type 3 (partial loss of terminal phalanx with corresponding loss of pulp and nail but not involving lunula) | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Traumatic amputation of fingertip, type 3 (partial loss of terminal phalanx with corresponding loss of pulp and nail but not involving lunula) | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Traumatic amputation thumb tip, type 4 (partial loss of terminal phalanx, pulp and nail including lunula) | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  | 
| Traumatic amputation of fingertip, type 4 (partial loss of terminal phalanx, pulp and nail including lunula) | Is a | True | Absence of bone in arm | Inferred relationship | Existential restriction modifier |  |