| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Humeroulnar synostosis | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 2 | 
| Infection of ulna | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 3 | 
| Ulna X-ray | Procedure site - Direct | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 2 | 
| Structure of bone marrow of ulna | Is a | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier |  | 
| Ulna metaphyseal dysplasia syndrome | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 2 | 
| Fibulo-ulnar hypoplasia and renal anomalies syndrome | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 5 | 
| Bone structure of left ulna | Is a | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier |  | 
| Bone structure of right ulna | Is a | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier |  | 
| Congenital hypoplasia of ulna and intellectual disability syndrome | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 2 | 
| Ulna fibula ray defect and brachydactyly syndrome | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 7 | 
| Ulna fibula ray defect and brachydactyly syndrome | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 4 | 
| Congenital hypoplasia of ulna and split foot syndrome | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 5 | 
| Congenital absence of forearm and hand | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 5 | 
| Spondyloperipheral dysplasia with short ulna syndrome | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Pathologic fracture of ulna at site of neoplasm | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Ulna metaphyseal dysplasia syndrome | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Fibulo-ulnar hypoplasia and renal anomalies syndrome | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital hypoplasia of ulna and split foot syndrome | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 2 | 
| Congenital absence of forearm and hand | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 3 | 
| Ulna fibula ray defect and brachydactyly syndrome | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 3 | 
| Plain X-ray for ulnar variance view | Procedure site - Direct | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Short ulna, dysmorphism, hypotonia, intellectual disability syndrome | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Humeroradioulnar synostosis | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 3 | 
| Congenital absence of left forearm and hand | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 4 | 
| Congenital absence of right forearm and hand | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 4 | 
| Congenital bowing of ulna | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Radioulnar synostosis with microcephaly and scoliosis syndrome | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 3 | 
| Capra DeMarco syndrome | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Radioulnar synostosis with amegakaryocytic thrombocytopenia syndrome | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 3 | 
| Radioulnar synostosis with developmental delay and hypotonia syndrome | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 3 | 
| Operation for injury of radius AND ulna | Procedure site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Secondary osteoporotic fracture of ulna | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Osteoporotic fracture of ulna | Finding site | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Osteotomy of radius and ulna | Procedure site - Direct | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Arthrodesis of distal radioulnar joint and segmental resection of ulna with bone graft | Procedure site - Direct | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 3 | 
| Grafting of bone of ulna | Procedure site - Direct | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Grafting of bone of ulna | Procedure site - Direct | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 2 | 
| Excision of radius AND ulna for graft | Procedure site - Direct | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 3 | 
| Arthrodesis of distal radioulnar joint and segmental resection of ulna with bone graft | Procedure site - Direct | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 4 | 
| Grafting of radius and ulna | Procedure site - Direct | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 3 | 
| Grafting of radius and ulna | Procedure site - Direct | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Periosteal suture of ulna | Procedure site - Indirect | True | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Ultrasound guided biopsy of radius and ulna (procedure) | Procedure site - Direct | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 2 | 
| Ultrasound guided biopsy of radius and ulna (procedure) | Procedure site - Direct | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 3 | 
| Fluoroscopy guided biopsy of radius and ulna | Procedure site - Direct | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 2 | 
| Fluoroscopy guided biopsy of radius and ulna | Procedure site - Direct | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 4 | 
| Open fracture of radius and ulna, NOS | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture of ulna (alone), unspecified | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Closed fracture of radius and ulna, unspecified part | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 2 | 
| Closed fracture of forearm, unspecified | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 2 | 
| Closed fracture of radius and ulna, NOS | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 2 | 
| Open fracture of radius and ulna, unspecified part | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture of forearm, unspecified | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Fracture of radius and ulna, NOS | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 2 | 
| Fracture of ulna NOS | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| Open fracture of ulna (alone), unspecified | Finding site | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 | 
| X-ray for ulnar variance view (procedure) | Procedure site - Direct | False | Bone structure of ulna | Inferred relationship | Existential restriction modifier | 1 |