Anomalous Course of the Brachial Plexus Identified During Ultrasound-Guided Brachial Plexus Nerve Block

1. Department of Anaesthesiology and Perioperative Medicine, Mayo Clinic, Jacksonville, Florida, USA

2. Division of Musculoskeletal Radiology, Department of Radiology, Mayo Clinic, Jacksonville, Florida, USA

3. Department of Orthopaedic Surgery, Mayo Clinic, Jacksonville, Florida, USA

4. Division of Plastic Surgery, Department of Surgery, Cooper University Hospital, Camden, New Jersey, USA