Snapshot A 40-year-old man presents with difficulty grasping his tennis racket. The patient reports difficulty with maintaining a strong grip on his racket. This symptom is accompanied by numbness and tingling. On physical exam, there is atrophy of his intrinsic hand muscles. Introduction Clinical definition login to view 6 more bullets Epidemiology Demographics login to view 1 more bullet Etiology Bony login to view 3 more bullets Soft tissue login to view 5 more bullets trauma Pathogenesis login to view 2 more bullets Presentation Symptoms login to view 11 more bullets Physical exam login to view 13 more bullets Imaging Radiographs login to view 5 more bullets Magnetic resonance imaging (MRI) login to view 2 more bullets Ultrasound login to view 4 more bullets Angiography login to view 4 more bullets Studies Making the diagnosis login to view 1 more bullet Differential Other causes of vascular compromise, such as emboli login to view 2 more bullets Treatment Conservative login to view 3 more bullets Medical login to view 6 more bullets Operative login to view 5 more bullets Complications Aneurysm formation (post-stenotic) Thromboembolism