Greater arc injury of the wrist with fractured lunate bone: a case report.

Carpal dislocation and fracture dislocation are uncommon and difficult to treat. Early diagnosis and treatment of such injuries are necessary to prevent progressive carpal instability and traumatic arthritis. Perilunate fracture dislocation is a combination of ligamentous and osseous injuries that involve the 'greater arc' of the perilunate. Despite being severe, these injuries often go unrecognised in the emergency department, leading to delayed diagnosis and treatment. We present a case of greater arc injury of the right wrist with fractures of the lunate and ulnar styloid without perilunate dislocation. This pattern of injury cannot be classified in the available literature on greater arc injury.