Abstract
BackgroundHook of the hamate fractures are particularly rare carpal fractures with significant morbidity if not diagnosed early. Classically, these fractures occur from localized blunt trauma to the hook of the hamate in racket sports. Common complaints include pain localized in the hypothenar eminence and reduced grip strength. Hook of the hamate fractures have the potential to cause significant injury to the ulnar nerve and artery. Case ReportWe present the case of a 43-year-old man with hypothenar pain, paresthesias of the fifth finger and ulnar aspect of the fourth finger, and pallor of the fourth and fifth fingers. Using bedside ultrasonography, the patient was found to have a fracture of the hook of the hamate that was causing compression of the ulnar artery. Why Should an Emergency Physician Be Aware of This?Fracture of the hook of the hamate is often not seen on x-ray studies, and fracture fragments can cause compression of adjacent structures, including the ulnar and median nerves and ulnar artery. Bedside ultrasound may be a useful adjunct in the diagnosis of this carpal fracture when standard x-ray studies do not show a fracture and clinical presentation is concerning for the diagnosis.
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