Radioulna Synostosis

Congenital

 

Epidemiology

 

Usually bilateral / AD

 

Pathology

 

Failure of separation of cartilaginous rods that form radius and ulna

 

Clinically

 

Forearm in varying degrees of pronation (supination rare)

- may have difficulty with ADL's

 

Management

 

Pronation is more useful position than supination

 

May need supination on one side

- osteotomy radius and ulna

- changes functional position not arc of range

- high risk of comparment syndrome

 

Acquired

 

Aetiology

 

Fractures at same level

Most common proximally

 

Management

 

Excision of synostosis and interpose fascia 

- poor results