In this issue of�Hand Clinics,�guest�editors�Fr�d�ric�Schuind, Fabian�Moungondo, and Luc Van�Overstraeten�bring�their�considerable expertise to the topic of�The Use of Sonography in Hand/Upper Extremity Surgery. Top experts in the field cover key topics such�as�Flexor Tendons Sonography,�Sonographic Diagnosis of Carpal Tunnel Syndrome,�Atlas of Sonographic Anatomy of the Hand and Wrist, and more.