The brachial plexus (BP) is a complicated neural network, which may be affected by trauma, irradiation, neoplasm, infection, and autoimmune inflammatory diseases. Magnetic Resonance Imaging is the preferred diagnostic modality; however, it has the limitations of high cost and lack of portability. High-resolution ultrasound has recently emerged as an unparalleled diagnostic tool for diagnosing postganglionic lesions of the BP. Existing literature describes the technical skills needed for prompt ultrasound imaging and guided injections for the BP. However, it remains particularly challenging for beginners to navigate easily while scanning its different parts. To address this, we share several "clinical pearls" for the sonographic examination of the BP as well as its common pathologies.

Center for Anatomy and Cell Biology Medical University of Vienna and Radiology Hanusch Hospital 1090 Vienna Austria

Department of Biomedical and Neuromotor Science Physical and Rehabilitation Medicine Unit Istituto di Ricovero e Cura a Carattere Scientifico Rizzoli Orthopedic Institute 40136 Bologna Italy

Department of Physical and Rehabilitation Medicine Hacettepe University Medical School 06100 Ankara Turkey

Department of Physical Medicine and Rehabilitation National Taiwan University College of Medicine Taipei 10048 Taiwan

Department of Physical Medicine and Rehabilitation National Taiwan University Hospital Bei Hu Branch Taipei 10845 Taiwan

Department of Physical Medicine and Rehabilitation Taipei Veterans General Hospital Taipei 11221 Taiwan

Department of Rehabilitation Medicine Charles University 1st Faculty of Medicine and General University Hospital Prague 12800 Prague Czech Republic

Institute of Anatomy Charles University 1st Faculty of Medicine 12800 Prague Czech Republic

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